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  • Hello Eli. I rechecked, when I now enter living-gorgeously.com I get redirected to a spam link. The malicious links are still in the functions.php I sent you an email to request for help. Would you help me clean up my file or give me instructions on what to do myself? I tried your tool and scanned and everything and it says 1 file in quarantine functions.php and i can either restore or delete it but I don’t want to break my site so I’m careful. How should I proceed? Thanks.

    Google Ads Support said there is still a malicious link detected on the page
    https[:]//living-gorgeously[.]com/events

    wowreality[.]info’

    how do I remove it or where do I find it?

    thanks, I ran the scan and the known threat has been removed from functions.php thanks a lot for your help

    oh yeah got it downloaded the updates

    download the latest definition updates of your plugin or of what?

    I used your plugin and it only scans potential threats, not remove them, Potential Threats
    * NOTE: These are probably not malicious scripts (but it’s a good place to start looking IF your site is infected and no Known Threats were found).

    ?…/WordPress_02/wp-admin/includes/class-pclzip.php
    ?…/WordPress_02/wp-content/plugins/elementor-pro/assets/lib/smartmenus/jquery.smartmenus.js
    ?…/WordPress_02/wp-content/plugins/elementor-pro/assets/lib/smartmenus/jquery.smartmenus.min.js
    ?…/WordPress_02/wp-content/plugins/gp-premium/hooks/functions/hooks.php
    ?…/WordPress_02/wp-content/plugins/memberpress/js/jquery-ui-timepicker-addon.js
    ?…/WordPress_02/wp-includes/js/json2.js
    ?…/WordPress_02/wp-includes/js/json2.min.js
    ?…/WordPress_02/wp-includes/js/tw-sack.js
    ?…/WordPress_02/wp-includes/js/tw-sack.min.js
    ?…/WordPress_02/wp-includes/js/jquery/jquery.form.min.js
    ?…/WordPress_02/wp-includes/js/jquery/jquery.schedule.js
    ?…/WordPress_02/wp-includes/js/tinymce/tiny_mce_popup.js

    I also sent you an email eli. If you can help me, I’d be extremely thankful.

    C . ‘/option.php’ );

    /**
    * Convert given date string into a different format.
    *
    * $format should be either a PHP date format string, e.g. ‘U’ for a Unix
    * timestamp, or ‘G’ for a Unix timestamp assuming that $date is GMT.
    *
    * If $translate is true then the given date and format string will
    * be passed to date_i18n() for translation.
    *
    * @since 0.71
    *
    * @param string $format Format of the date to return.
    * @param string $date Date string to convert.
    * @param bool $translate Whether the return date should be translated. Default true.
    * @return string|int|bool Formatted date string or Unix timestamp. False if $date is empty.
    */
    function mysql2date( $format, $date, $translate = true ) {
    if ( empty( $date ) )
    return false;

    if ( ‘G’ == $format )
    return strtotime( $date . ‘ +0000’ );

    $i = strtotime( $date );

    if ( ‘U’ == $format )
    return $i;

    if ( $translate )
    return date_i18n( $format, $i );
    else
    return date( $format, $i );
    }

    /**
    * Retrieve the current time based on specified type.
    *
    * The ‘mysql’ type will return the time in the format for MySQL DATETIME field.
    * The ‘timestamp’ type will return the current timestamp.
    * Other strings will be interpreted as PHP date formats (e.g. ‘Y-m-d’).
    *
    * If $gmt is set to either ‘1’ or ‘true’, then both types will use GMT time.
    * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
    *
    * @since 1.0.0
    *
    * @param string $type Type of time to retrieve. Accepts ‘mysql’, ‘timestamp’, or PHP date
    * format string (e.g. ‘Y-m-d’).
    * @param int|bool $gmt Optional. Whether to use GMT timezone. Default false.
    * @return int|string Integer if $type is ‘timestamp’, string otherwise.
    */
    function current_time( $type, $gmt = 0 ) {
    switch ( $type ) {
    case ‘mysql’:
    return ( $gmt ) ? gmdate( ‘Y-m-d H:i:s’ ) : gmdate( ‘Y-m-d H:i:s’, ( time() + ( get_option( ‘gmt_offset’ ) * HOUR_IN_SECONDS ) ) );
    case ‘timestamp’:
    return ( $gmt ) ? time() : time() + ( get_option( ‘gmt_offset’ ) * HOUR_IN_SECONDS );
    default:
    return ( $gmt ) ? date( $type ) : date( $type, time() + ( get_option( ‘gmt_offset’ ) * HOUR_IN_SECONDS ) );
    }
    }

    /**
    * Retrieve the date in localized format, based on timestamp.
    *
    * If the locale specifies the locale month and weekday, then the locale will
    * take over the format for the date. If it isn’t, then the date format string
    * will be used instead.
    *
    * @since 0.71
    *
    * @global WP_Locale $wp_locale
    *
    * @param string $dateformatstring Format to display the date.
    * @param bool|int $unixtimestamp Optional. Unix timestamp. Default false.
    * @param bool $gmt Optional. Whether to use GMT timezone. Default false.
    *
    * @return string The date, translated if locale specifies it.
    */
    function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
    global $wp_locale;
    $i = $unixtimestamp;

    if ( false === $i ) {
    $i = current_time( ‘timestamp’, $gmt );
    }

    /*
    * Store original value for language with untypical grammars.
    * See https://core.trac.wordpress.org/ticket/9396
    */
    $req_format = $dateformatstring;

    if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
    $datemonth = $wp_locale->get_month( date( ‘m’, $i ) );
    $datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
    $dateweekday = $wp_locale->get_weekday( date( ‘w’, $i ) );
    $dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
    $datemeridiem = $wp_locale->get_meridiem( date( ‘a’, $i ) );
    $datemeridiem_capital = $wp_locale->get_meridiem( date( ‘A’, $i ) );
    $dateformatstring = ‘ ‘.$dateformatstring;
    $dateformatstring = preg_replace( “/([^\\\])D/”, “\\1” . backslashit( $dateweekday_abbrev ), $dateformatstring );
    $dateformatstring = preg_replace( “/([^\\\])F/”, “\\1” . backslashit( $datemonth ), $dateformatstring );
    $dateformatstring = preg_replace( “/([^\\\])l/”, “\\1” . backslashit( $dateweekday ), $dateformatstring );
    $dateformatstring = preg_replace( “/([^\\\])M/”, “\\1” . backslashit( $datemonth_abbrev ), $dateformatstring );
    $dateformatstring = preg_replace( “/([^\\\])a/”, “\\1” . backslashit( $datemeridiem ), $dateformatstring );
    $dateformatstring = preg_replace( “/([^\\\])A/”, “\\1” . backslashit( $datemeridiem_capital ), $dateformatstring );

    $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
    }
    $timezone_formats = array( ‘P’, ‘I’, ‘O’, ‘T’, ‘Z’, ‘e’ );
    $timezone_formats_re = implode( ‘|’, $timezone_formats );
    if ( preg_match( “/$timezone_formats_re/”, $dateformatstring ) ) {
    $timezone_string = get_option( ‘timezone_string’ );
    if ( $timezone_string ) {
    $timezone_object = timezone_open( $timezone_string );
    $date_object = date_create( null, $timezone_object );
    foreach ( $timezone_formats as $timezone_format ) {
    if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
    $formatted = date_format( $date_object, $timezone_format );
    $dateformatstring = ‘ ‘.$dateformatstring;
    $dateformatstring = preg_replace( “/([^\\\])$timezone_format/”, “\\1″ . backslashit( $formatted ), $dateformatstring );
    $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
    }
    }
    }
    }
    $j = @date( $dateformatstring, $i );

    /**
    * Filters the date formatted based on the locale.
    *
    * @since 2.8.0
    *
    * @param string $j Formatted date string.
    * @param string $req_format Format to display the date.
    * @param int $i Unix timestamp.
    * @param bool $gmt Whether to convert to GMT for time. Default false.
    */
    $j = apply_filters( ‘date_i18n’, $j, $req_format, $i, $gmt );
    return $j;
    }

    /**
    * Determines if the date should be declined.
    *
    * If the locale specifies that month names require a genitive case in certain
    * formats (like ‘j F Y’), the month name will be replaced with a correct form.
    *
    * @since 4.4.0
    *
    * @global WP_Locale $wp_locale
    *
    * @param string $date Formatted date string.
    * @return string The date, declined if locale specifies it.
    */
    function wp_maybe_decline_date( $date ) {
    global $wp_locale;

    // i18n functions are not available in SHORTINIT mode
    if ( ! function_exists( ‘_x’ ) ) {
    return $date;
    }

    /* translators: If months in your language require a genitive case,
    * translate this to ‘on’. Do not translate into your own language.
    */
    if ( ‘on’ === _x( ‘off’, ‘decline months names: on or off’ ) ) {
    // Match a format like ‘j F Y’ or ‘j. F’
    if ( @preg_match( ‘#^\d{1,2}\.? [^\d ]+#u’, $date ) ) {
    $months = $wp_locale->month;
    $months_genitive = $wp_locale->month_genitive;

    foreach ( $months as $key => $month ) {
    $months[ $key ] = ‘# ‘ . $month . ‘( |$)#u’;
    }

    foreach ( $months_genitive as $key => $month ) {
    $months_genitive[ $key ] = ‘ ‘ . $month . ‘$1’;
    }

    $date = preg_replace( $months, $months_genitive, $date );
    }
    }

    // Used for locale-specific rules
    $locale = get_locale();

    if ( ‘ca’ === $locale ) {
    // ” de abril| de agost| de octubre…” -> ” d’abril| d’agost| d’octubre…”
    $date = preg_replace( ‘# de ([ao])#i’, ” d’\\1″, $date );
    }

    return $date;
    }

    /**
    * Convert float number to format based on the locale.
    *
    * @since 2.3.0
    *
    * @global WP_Locale $wp_locale
    *
    * @param float $number The number to convert based on locale.
    * @param int $decimals Optional. Precision of the number of decimal places. Default 0.
    * @return string Converted number in string format.
    */
    function number_format_i18n( $number, $decimals = 0 ) {
    global $wp_locale;

    if ( isset( $wp_locale ) ) {
    $formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format[‘decimal_point’], $wp_locale->number_format[‘thousands_sep’] );
    } else {
    $formatted = number_format( $number, absint( $decimals ) );
    }

    /**
    * Filters the number formatted based on the locale.
    *
    * @since 2.8.0
    * @since 4.9.0 The $number and $decimals arguments were added.
    *
    * @param string $formatted Converted number in string format.
    * @param float $number The number to convert based on locale.
    * @param int $decimals Precision of the number of decimal places.
    */
    return apply_filters( ‘number_format_i18n’, $formatted, $number, $decimals );
    }

    /**
    * Convert number of bytes largest unit bytes will fit into.
    *
    * It is easier to read 1 KB than 1024 bytes and 1 MB than 1048576 bytes. Converts
    * number of bytes to human readable number by taking the number of that unit
    * that the bytes will go into it. Supports TB value.
    *
    * Please note that integers in PHP are limited to 32 bits, unless they are on
    * 64 bit architecture, then they have 64 bit size. If you need to place the
    * larger size then what PHP integer type will hold, then use a string. It will
    * be converted to a double, which should always have 64 bit length.
    *
    * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
    *
    * @since 2.3.0
    *
    * @param int|string $bytes Number of bytes. Note max integer size for integers.
    * @param int $decimals Optional. Precision of number of decimal places. Default 0.
    * @return string|false False on failure. Number string on success.
    */
    function size_format( $bytes, $decimals = 0 ) {
    $quant = array(
    ‘TB’ => TB_IN_BYTES,
    ‘GB’ => GB_IN_BYTES,
    ‘MB’ => MB_IN_BYTES,
    ‘KB’ => KB_IN_BYTES,
    ‘B’ => 1,
    );

    if ( 0 === $bytes ) {
    return number_format_i18n( 0, $decimals ) . ‘ B’;
    }

    foreach ( $quant as $unit => $mag ) {
    if ( doubleval( $bytes ) >= $mag ) {
    return number_format_i18n( $bytes / $mag, $decimals ) . ‘ ‘ . $unit;
    }
    }

    return false;
    }

    /**
    * Get the week start and end from the datetime or date string from MySQL.
    *
    * @since 0.71
    *
    * @param string $mysqlstring Date or datetime field type from MySQL.
    * @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.
    * @return array Keys are ‘start’ and ‘end’.
    */
    function get_weekstartend( $mysqlstring, $start_of_week = ” ) {
    // MySQL string year.
    $my = substr( $mysqlstring, 0, 4 );

    // MySQL string month.
    $mm = substr( $mysqlstring, 8, 2 );

    // MySQL string day.
    $md = substr( $mysqlstring, 5, 2 );

    // The timestamp for MySQL string day.
    $day = mktime( 0, 0, 0, $md, $mm, $my );

    // The day of the week from the timestamp.
    $weekday = date( ‘w’, $day );

    if ( !is_numeric($start_of_week) )
    $start_of_week = get_option( ‘start_of_week’ );

    if ( $weekday < $start_of_week )
    $weekday += 7;

    // The most recent week start day on or before $day.
    $start = $day – DAY_IN_SECONDS * ( $weekday – $start_of_week );

    // $start + 1 week – 1 second.
    $end = $start + WEEK_IN_SECONDS – 1;
    return compact( ‘start’, ‘end’ );
    }

    /**
    * Unserialize value only if it was serialized.
    *
    * @since 2.0.0
    *
    * @param string $original Maybe unserialized original, if is needed.
    * @return mixed Unserialized data can be any type.
    */
    function maybe_unserialize( $original ) {
    if ( is_serialized( $original ) ) // don’t attempt to unserialize data that wasn’t serialized going in
    return @unserialize( $original );
    return $original;
    }

    /**
    * Check value to find if it was serialized.
    *
    * If $data is not an string, then returned value will always be false.
    * Serialized data is always a string.
    *
    * @since 2.0.5
    *
    * @param string $data Value to check to see if was serialized.
    * @param bool $strict Optional. Whether to be strict about the end of the string. Default true.
    * @return bool False if not serialized and true if it was.
    */
    function is_serialized( $data, $strict = true ) {
    // if it isn’t a string, it isn’t serialized.
    if ( ! is_string( $data ) ) {
    return false;
    }
    $data = trim( $data );
    if ( ‘N;’ == $data ) {
    return true;
    }
    if ( strlen( $data ) < 4 ) {
    return false;
    }
    if ( ‘:’ !== $data[1] ) {
    return false;
    }
    if ( $strict ) {
    $lastc = substr( $data, -1 );
    if ( ‘;’ !== $lastc && ‘}’ !== $lastc ) {
    return false;
    }
    } else {
    $semicolon = strpos( $data, ‘;’ );
    $brace = strpos( $data, ‘}’ );
    // Either ; or } must exist.
    if ( false === $semicolon && false === $brace )
    return false;
    // But neither must be in the first X characters.
    if ( false !== $semicolon && $semicolon < 3 )
    return false;
    if ( false !== $brace && $brace < 4 )
    return false;
    }
    $token = $data[0];
    switch ( $token ) {
    case ‘s’ :
    if ( $strict ) {
    if ( ‘”‘ !== substr( $data, -2, 1 ) ) {
    return false;
    }
    } elseif ( false === strpos( $data, ‘”‘ ) ) {
    return false;
    }
    // or else fall through
    case ‘a’ :
    case ‘O’ :
    return (bool) preg_match( “/^{$token}:[0-9]+:/s”, $data );
    case ‘b’ :
    case ‘i’ :
    case ‘d’ :
    $end = $strict ? ‘$’ : ”;
    return (bool) preg_match( “/^{$token}:[0-9.E-]+;$end/”, $data );
    }
    return false;
    }

    /**
    * Check whether serialized data is of string type.
    *
    * @since 2.0.5
    *
    * @param string $data Serialized data.
    * @return bool False if not a serialized string, true if it is.
    */
    function is_serialized_string( $data ) {
    // if it isn’t a string, it isn’t a serialized string.
    if ( ! is_string( $data ) ) {
    return false;
    }
    $data = trim( $data );
    if ( strlen( $data ) < 4 ) {
    return false;
    } elseif ( ‘:’ !== $data[1] ) {
    return false;
    } elseif ( ‘;’ !== substr( $data, -1 ) ) {
    return false;
    } elseif ( $data[0] !== ‘s’ ) {
    return false;
    } elseif ( ‘”‘ !== substr( $data, -2, 1 ) ) {
    return false;
    } else {
    return true;
    }
    }

    /**
    * Serialize data, if needed.
    *
    * @since 2.0.5
    *
    * @param string|array|object $data Data that might be serialized.
    * @return mixed A scalar data
    */
    function maybe_serialize( $data ) {
    if ( is_array( $data ) || is_object( $data ) )
    return serialize( $data );

    // Double serialization is required for backward compatibility.
    // See https://core.trac.wordpress.org/ticket/12930
    // Also the world will end. See WP 3.6.1.
    if ( is_serialized( $data, false ) )
    return serialize( $data );

    return $data;
    }

    /**
    * Retrieve post title from XMLRPC XML.
    *
    * If the title element is not part of the XML, then the default post title from
    * the $post_default_title will be used instead.
    *
    * @since 0.71
    *
    * @global string $post_default_title Default XML-RPC post title.
    *
    * @param string $content XMLRPC XML Request content
    * @return string Post title
    */
    function xmlrpc_getposttitle( $content ) {
    global $post_default_title;
    if ( preg_match( ‘/<title>(.+?)<\/title>/is’, $content, $matchtitle ) ) {
    $post_title = $matchtitle[1];
    } else {
    $post_title = $post_default_title;
    }
    return $post_title;
    }

    /**
    * Retrieve the post category or categories from XMLRPC XML.
    *
    * If the category element is not found, then the default post category will be
    * used. The return type then would be what $post_default_category. If the
    * category is found, then it will always be an array.
    *
    * @since 0.71
    *
    * @global string $post_default_category Default XML-RPC post category.
    *
    * @param string $content XMLRPC XML Request content
    * @return string|array List of categories or category name.
    */
    function xmlrpc_getpostcategory( $content ) {
    global $post_default_category;
    if ( preg_match( ‘/<category>(.+?)<\/category>/is’, $content, $matchcat ) ) {
    $post_category = trim( $matchcat[1], ‘,’ );
    $post_category = explode( ‘,’, $post_category );
    } else {
    $post_category = $post_default_category;
    }
    return $post_category;
    }

    /**
    * XMLRPC XML content without title and category elements.
    *
    * @since 0.71
    *
    * @param string $content XML-RPC XML Request content.
    * @return string XMLRPC XML Request content without title and category elements.
    */
    function xmlrpc_removepostdata( $content ) {
    $content = preg_replace( ‘/<title>(.+?)<\/title>/si’, ”, $content );
    $content = preg_replace( ‘/<category>(.+?)<\/category>/si’, ”, $content );
    $content = trim( $content );
    return $content;
    }

    /**
    * Use RegEx to extract URLs from arbitrary content.
    *
    * @since 3.7.0
    *
    * @param string $content Content to extract URLs from.
    * @return array URLs found in passed string.
    */
    function wp_extract_urls( $content ) {
    preg_match_all(
    “#([\”‘]?)(”
    . “(?:([\w-]+:)?//?)”
    . “[^\s()<>]+”
    . “[.]”
    . “(?:”
    . “\([\w\d]+\)|”
    . “(?:”
    . “[^`!()\[\]{};:’\”.,<>«»“”‘’\s]|”
    . “(?:[:]\d+)?/?”
    . “)+”
    . “)”
    . “)\\1#”,
    $content,
    $post_links
    );

    $post_links = array_unique( array_map( ‘html_entity_decode’, $post_links[2] ) );

    return array_values( $post_links );
    }

    /**
    * Check content for video and audio links to add as enclosures.
    *
    * Will not add enclosures that have already been added and will
    * remove enclosures that are no longer in the post. This is called as
    * pingbacks and trackbacks.
    *
    * @since 1.5.0
    *
    * @global wpdb $wpdb WordPress database abstraction object.
    *
    * @param string $content Post Content.
    * @param int $post_ID Post ID.
    */
    function do_enclose( $content, $post_ID ) {
    global $wpdb;

    //TODO: Tidy this ghetto code up and make the debug code optional
    include_once( ABSPATH . WPINC . ‘/class-IXR.php’ );

    $post_links = array();

    $pung = get_enclosed( $post_ID );

    $post_links_temp = wp_extract_urls( $content );

    foreach ( $pung as $link_test ) {
    if ( ! in_array( $link_test, $post_links_temp ) ) { // link no longer in post
    $mids = $wpdb->get_col( $wpdb->prepare(“SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = ‘enclosure’ AND meta_value LIKE %s”, $post_ID, $wpdb->esc_like( $link_test ) . ‘%’) );
    foreach ( $mids as $mid )
    delete_metadata_by_mid( ‘post’, $mid );
    }
    }

    foreach ( (array) $post_links_temp as $link_test ) {
    if ( !in_array( $link_test, $pung ) ) { // If we haven’t pung it already
    $test = @parse_url( $link_test );
    if ( false === $test )
    continue;
    if ( isset( $test[‘query’] ) )
    $post_links[] = $link_test;
    elseif ( isset($test[‘path’]) && ( $test[‘path’] != ‘/’ ) && ($test[‘path’] != ” ) )
    $post_links[] = $link_test;
    }
    }

    /**
    * Filters the list of enclosure links before querying the database.
    *
    * Allows for the addition and/or removal of potential enclosures to save
    * to postmeta before checking the database for existing enclosures.
    *
    * @since 4.4.0
    *
    * @param array $post_links An array of enclosure links.
    * @param int $post_ID Post ID.
    */
    $post_links = apply_filters( ‘enclosure_links’, $post_links, $post_ID );

    foreach ( (array) $post_links as $url ) {
    if ( $url != ” && !$wpdb->get_var( $wpdb->prepare( “SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = ‘enclosure’ AND meta_value LIKE %s”, $post_ID, $wpdb->esc_like( $url ) . ‘%’ ) ) ) {

    if ( $headers = wp_get_http_headers( $url) ) {
    $len = isset( $headers[‘content-length’] ) ? (int) $headers[‘content-length’] : 0;
    $type = isset( $headers[‘content-type’] ) ? $headers[‘content-type’] : ”;
    $allowed_types = array( ‘video’, ‘audio’ );

    // Check to see if we can figure out the mime type from
    // the extension
    $url_parts = @parse_url( $url );
    if ( false !== $url_parts ) {
    $extension = pathinfo( $url_parts[‘path’], PATHINFO_EXTENSION );
    if ( !empty( $extension ) ) {
    foreach ( wp_get_mime_types() as $exts => $mime ) {
    if ( preg_match( ‘!^(‘ . $exts . ‘)$!i’, $extension ) ) {
    $type = $mime;
    break;
    }
    }
    }
    }

    if ( in_array( substr( $type, 0, strpos( $type, “/” ) ), $allowed_types ) ) {
    add_post_meta( $post_ID, ‘enclosure’, “$url\n$len\n$mime\n” );
    }
    }
    }
    }
    }

    /**
    * Retrieve HTTP Headers from URL.
    *
    * @since 1.5.1
    *
    * @param string $url URL to retrieve HTTP headers from.
    * @param bool $deprecated Not Used.
    * @return bool|string False on failure, headers on success.
    */
    function wp_get_http_headers( $url, $deprecated = false ) {
    if ( !empty( $deprecated ) )
    _deprecated_argument( __FUNCTION__, ‘2.7.0’ );

    $response = wp_safe_remote_head( $url );

    if ( is_wp_error( $response ) )
    return false;

    return wp_remote_retrieve_headers( $response );
    }

    /**
    * Determines whether the publish date of the current post in the loop is different
    * from the publish date of the previous post in the loop.
    *
    * For more information on this and similar theme functions, check out
    * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
    * Conditional Tags} article in the Theme Developer Handbook.
    *
    * @since 0.71
    *
    * @global string $currentday The day of the current post in the loop.
    * @global string $previousday The day of the previous post in the loop.
    *
    * @return int 1 when new day, 0 if not a new day.
    */
    function is_new_day() {
    global $currentday, $previousday;
    if ( $currentday != $previousday )
    return 1;
    else
    return 0;
    }

    /**
    * Build URL query based on an associative and, or indexed array.
    *
    * This is a convenient function for easily building url queries. It sets the
    * separator to ‘&’ and uses _http_build_query() function.
    *
    * @since 2.3.0
    *
    * @see _http_build_query() Used to build the query
    * @link https://secure.php.net/manual/en/function.http-build-query.php for more on what
    * http_build_query() does.
    *
    * @param array $data URL-encode key/value pairs.
    * @return string URL-encoded string.
    */
    function build_query( $data ) {
    return _http_build_query( $data, null, ‘&’, ”, false );
    }

    /**
    * From php.net (modified by Mark Jaquith to behave like the native PHP5 function).
    *
    * @since 3.2.0
    * @access private
    *
    * @see https://secure.php.net/manual/en/function.http-build-query.php
    *
    * @param array|object $data An array or object of data. Converted to array.
    * @param string $prefix Optional. Numeric index. If set, start parameter numbering with it.
    * Default null.
    * @param string $sep Optional. Argument separator; defaults to ‘arg_separator.output’.
    * Default null.
    * @param string $key Optional. Used to prefix key name. Default empty.
    * @param bool $urlencode Optional. Whether to use urlencode() in the result. Default true.
    *
    * @return string The query string.
    */
    function _http_build_query( $data, $prefix = null, $sep = null, $key = ”, $urlencode = true ) {
    $ret = array();

    foreach ( (array) $data as $k => $v ) {
    if ( $urlencode)
    $k = urlencode($k);
    if ( is_int($k) && $prefix != null )
    $k = $prefix.$k;
    if ( !empty($key) )
    $k = $key . ‘%5B’ . $k . ‘%5D’;
    if ( $v === null )
    continue;
    elseif ( $v === false )
    $v = ‘0’;

    if ( is_array($v) || is_object($v) )
    array_push($ret,_http_build_query($v, ”, $sep, $k, $urlencode));
    elseif ( $urlencode )
    array_push($ret, $k.’=’.urlencode($v));
    else
    array_push($ret, $k.’=’.$v);
    }

    if ( null === $sep )
    $sep = ini_get(‘arg_separator.output’);

    return implode($sep, $ret);
    }

    /**
    * Retrieves a modified URL query string.
    *
    * You can rebuild the URL and append query variables to the URL query by using this function.
    * There are two ways to use this function; either a single key and value, or an associative array.
    *
    * Using a single key and value:
    *
    * add_query_arg( ‘key’, ‘value’, ‘http://example.com&#8217; );
    *
    * Using an associative array:
    *
    * add_query_arg( array(
    * ‘key1’ => ‘value1’,
    * ‘key2’ => ‘value2’,
    * ), ‘http://example.com&#8217; );
    *
    * Omitting the URL from either use results in the current URL being used
    * (the value of $_SERVER['REQUEST_URI']).
    *
    * Values are expected to be encoded appropriately with urlencode() or rawurlencode().
    *
    * Setting any query variable’s value to boolean false removes the key (see remove_query_arg()).
    *
    * Important: The return value of add_query_arg() is not escaped by default. Output should be
    * late-escaped with esc_url() or similar to help prevent vulnerability to cross-site scripting
    * (XSS) attacks.
    *
    * @since 1.5.0
    *
    * @param string|array $key Either a query variable key, or an associative array of query variables.
    * @param string $value Optional. Either a query variable value, or a URL to act upon.
    * @param string $url Optional. A URL to act upon.
    * @return string New URL query string (unescaped).
    */
    function add_query_arg() {
    $args = func_get_args();
    if ( is_array( $args[0] ) ) {
    if ( count( $args ) < 2 || false === $args[1] )
    $uri = $_SERVER[‘REQUEST_URI’];
    else
    $uri = $args[1];
    } else {
    if ( count( $args ) < 3 || false === $args[2] )
    $uri = $_SERVER[‘REQUEST_URI’];
    else
    $uri = $args[2];
    }

    if ( $frag = strstr( $uri, ‘#’ ) )
    $uri = substr( $uri, 0, -strlen( $frag ) );
    else
    $frag = ”;

    if ( 0 === stripos( $uri, ‘http://&#8217; ) ) {
    $protocol = ‘http://&#8217;;
    $uri = substr( $uri, 7 );
    } elseif ( 0 === stripos( $uri, ‘https://&#8217; ) ) {
    $protocol = ‘https://&#8217;;
    $uri = substr( $uri, 8 );
    } else {
    $protocol = ”;
    }

    if ( strpos( $uri, ‘?’ ) !== false ) {
    list( $base, $query ) = explode( ‘?’, $uri, 2 );
    $base .= ‘?’;
    } elseif ( $protocol || strpos( $uri, ‘=’ ) === false ) {
    $base = $uri . ‘?’;
    $query = ”;
    } else {
    $base = ”;
    $query = $uri;
    }

    wp_parse_str( $query, $qs );
    $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
    if ( is_array( $args[0] ) ) {
    foreach ( $args[0] as $k => $v ) {
    $qs[ $k ] = $v;
    }
    } else {
    $qs[ $args[0] ] = $args[1];
    }

    foreach ( $qs as $k => $v ) {
    if ( $v === false )
    unset( $qs[$k] );
    }

    $ret = build_query( $qs );
    $ret = trim( $ret, ‘?’ );
    $ret = preg_replace( ‘#=(&|$)#’, ‘$1’, $ret );
    $ret = $protocol . $base . $ret . $frag;
    $ret = rtrim( $ret, ‘?’ );
    return $ret;
    }

    /**
    * Removes an item or items from a query string.
    *
    * @since 1.5.0
    *
    * @param string|array $key Query key or keys to remove.
    * @param bool|string $query Optional. When false uses the current URL. Default false.
    * @return string New URL query string.
    */
    function remove_query_arg( $key, $query = false ) {
    if ( is_array( $key ) ) { // removing multiple keys
    foreach ( $key as $k )
    $query = add_query_arg( $k, false, $query );
    return $query;
    }
    return add_query_arg( $key, false, $query );
    }

    /**
    * Returns an array of single-use query variable names that can be removed from a URL.
    *
    * @since 4.4.0
    *
    * @return array An array of parameters to remove from the URL.
    */
    function wp_removable_query_args() {
    $removable_query_args = array(
    ‘activate’,
    ‘activated’,
    ‘approved’,
    ‘deactivate’,
    ‘deleted’,
    ‘disabled’,
    ‘enabled’,
    ‘error’,
    ‘hotkeys_highlight_first’,
    ‘hotkeys_highlight_last’,
    ‘locked’,
    ‘message’,
    ‘same’,
    ‘saved’,
    ‘settings-updated’,
    ‘skipped’,
    ‘spammed’,
    ‘trashed’,
    ‘unspammed’,
    ‘untrashed’,
    ‘update’,
    ‘updated’,
    ‘wp-post-new-reload’,
    );

    /**
    * Filters the list of query variables to remove.
    *
    * @since 4.2.0
    *
    * @param array $removable_query_args An array of query variables to remove from a URL.
    */
    return apply_filters( ‘removable_query_args’, $removable_query_args );
    }

    /**
    * Walks the array while sanitizing the contents.
    *
    * @since 0.71
    *
    * @param array $array Array to walk while sanitizing contents.
    * @return array Sanitized $array.
    */
    function add_magic_quotes( $array ) {
    foreach ( (array) $array as $k => $v ) {
    if ( is_array( $v ) ) {
    $array[$k] = add_magic_quotes( $v );
    } else {
    $array[$k] = addslashes( $v );
    }
    }
    return $array;
    }

    /**
    * HTTP request for URI to retrieve content.
    *
    * @since 1.5.1
    *
    * @see wp_safe_remote_get()
    *
    * @param string $uri URI/URL of web page to retrieve.
    * @return false|string HTTP content. False on failure.
    */
    function wp_remote_fopen( $uri ) {
    $parsed_url = @parse_url( $uri );

    if ( !$parsed_url || !is_array( $parsed_url ) )
    return false;

    $options = array();
    $options[‘timeout’] = 10;

    $response = wp_safe_remote_get( $uri, $options );

    if ( is_wp_error( $response ) )
    return false;

    return wp_remote_retrieve_body( $response );
    }

    /**
    * Set up the WordPress query.
    *
    * @since 2.0.0
    *
    * @global WP $wp_locale
    * @global WP_Query $wp_query
    * @global WP_Query $wp_the_query
    *
    * @param string|array $query_vars Default WP_Query arguments.
    */
    function wp( $query_vars = ” ) {
    global $wp, $wp_query, $wp_the_query;
    $wp->main( $query_vars );

    if ( !isset($wp_the_query) )
    $wp_the_query = $wp_query;
    }

    /**
    * Retrieve the description for the HTTP status.
    *
    * @since 2.3.0
    *
    * @global array $wp_header_to_desc
    *
    * @param int $code HTTP status code.
    * @return string Empty string if not found, or description if found.
    */
    function get_status_header_desc( $code ) {
    global $wp_header_to_desc;

    $code = absint( $code );

    if ( !isset( $wp_header_to_desc ) ) {
    $wp_header_to_desc = array(
    100 => ‘Continue’,
    101 => ‘Switching Protocols’,
    102 => ‘Processing’,

    200 => ‘OK’,
    201 => ‘Created’,
    202 => ‘Accepted’,
    203 => ‘Non-Authoritative Information’,
    204 => ‘No Content’,
    205 => ‘Reset Content’,
    206 => ‘Partial Content’,
    207 => ‘Multi-Status’,
    226 => ‘IM Used’,

    300 => ‘Multiple Choices’,
    301 => ‘Moved Permanently’,
    302 => ‘Found’,
    303 => ‘See Other’,
    304 => ‘Not Modified’,
    305 => ‘Use Proxy’,
    306 => ‘Reserved’,
    307 => ‘Temporary Redirect’,
    308 => ‘Permanent Redirect’,

    400 => ‘Bad Request’,
    401 => ‘Unauthorized’,
    402 => ‘Payment Required’,
    403 => ‘Forbidden’,
    404 => ‘Not Found’,
    405 => ‘Method Not Allowed’,
    406 => ‘Not Acceptable’,
    407 => ‘Proxy Authentication Required’,
    408 => ‘Request Timeout’,
    409 => ‘Conflict’,
    410 => ‘Gone’,
    411 => ‘Length Required’,
    412 => ‘Precondition Failed’,
    413 => ‘Request Entity Too Large’,
    414 => ‘Request-URI Too Long’,
    415 => ‘Unsupported Media Type’,
    416 => ‘Requested Range Not Satisfiable’,
    417 => ‘Expectation Failed’,
    418 => ‘I\’m a teapot’,
    421 => ‘Misdirected Request’,
    422 => ‘Unprocessable Entity’,
    423 => ‘Locked’,
    424 => ‘Failed Dependency’,
    426 => ‘Upgrade Required’,
    428 => ‘Precondition Required’,
    429 => ‘Too Many Requests’,
    431 => ‘Request Header Fields Too Large’,
    451 => ‘Unavailable For Legal Reasons’,

    500 => ‘Internal Server Error’,
    501 => ‘Not Implemented’,
    502 => ‘Bad Gateway’,
    503 => ‘Service Unavailable’,
    504 => ‘Gateway Timeout’,
    505 => ‘HTTP Version Not Supported’,
    506 => ‘Variant Also Negotiates’,
    507 => ‘Insufficient Storage’,
    510 => ‘Not Extended’,
    511 => ‘Network Authentication Required’,
    );
    }

    if ( isset( $wp_header_to_desc[$code] ) )
    return $wp_header_to_desc[$code];
    else
    return ”;
    }

    /**
    * Set HTTP status header.
    *
    * @since 2.0.0
    * @since 4.4.0 Added the $description parameter.
    *
    * @see get_status_header_desc()
    *
    * @param int $code HTTP status code.
    * @param string $description Optional. A custom description for the HTTP status.
    */
    function status_header( $code, $description = ” ) {
    if ( ! $description ) {
    $description = get_status_header_desc( $code );
    }

    if ( empty( $description ) ) {
    return;
    }

    $protocol = wp_get_server_protocol();
    $status_header = “$protocol $code $description”;
    if ( function_exists( ‘apply_filters’ ) )

    /**
    * Filters an HTTP status header.
    *
    * @since 2.2.0
    *
    * @param string $status_header HTTP status header.
    * @param int $code HTTP status code.
    * @param string $description Description for the status code.
    * @param string $protocol Server protocol.
    */
    $status_header = apply_filters( ‘status_header’, $status_header, $code, $description, $protocol );

    @header( $status_header, true, $code );
    }

    /**
    * Get the header information to prevent caching.
    *
    * The several different headers cover the different ways cache prevention
    * is handled by different browsers
    *
    * @since 2.8.0
    *
    * @return array The associative array of header names and field values.
    */
    function wp_get_nocache_headers() {
    $headers = array(
    ‘Expires’ => ‘Wed, 11 Jan 1984 05:00:00 GMT’,
    ‘Cache-Control’ => ‘no-cache, must-revalidate, max-age=0’,
    );

    if ( function_exists(‘apply_filters’) ) {
    /**
    * Filters the cache-controlling headers.
    *
    * @since 2.8.0
    *
    * @see wp_get_nocache_headers()
    *
    * @param array $headers {
    * Header names and field values.
    *
    * @type string $Expires Expires header.
    * @type string $Cache-Control Cache-Control header.
    * }
    */
    $headers = (array) apply_filters( ‘nocache_headers’, $headers );
    }
    $headers[‘Last-Modified’] = false;
    return $headers;
    }

    /**
    * Set the headers to prevent caching for the different browsers.
    *
    * Different browsers support different nocache headers, so several
    * headers must be sent so that all of them get the point that no
    * caching should occur.
    *
    * @since 2.0.0
    *
    * @see wp_get_nocache_headers()
    */
    function nocache_headers() {
    $headers = wp_get_nocache_headers();

    unset( $headers[‘Last-Modified’] );

    // In PHP 5.3+, make sure we are not sending a Last-Modified header.
    if ( function_exists( ‘header_remove’ ) ) {
    @header_remove( ‘Last-Modified’ );
    } else {
    // In PHP 5.2, send an empty Last-Modified header, but only as a
    // last resort to override a header already sent. #WP23021
    foreach ( headers_list() as $header ) {
    if ( 0 === stripos( $header, ‘Last-Modified’ ) ) {
    $headers[‘Last-Modified’] = ”;
    break;
    }
    }
    }

    foreach ( $headers as $name => $field_value )
    @header(“{$name}: {$field_value}”);
    }

    /**
    * Set the headers for caching for 10 days with JavaScript content type.
    *
    * @since 2.1.0
    */
    function cache_javascript_headers() {
    $expiresOffset = 10 * DAY_IN_SECONDS;

    header( “Content-Type: text/javascript; charset=” . get_bloginfo( ‘charset’ ) );
    header( “Vary: Accept-Encoding” ); // Handle proxies
    header( “Expires: ” . gmdate( “D, d M Y H:i:s”, time() + $expiresOffset ) . ” GMT” );
    }

    /**
    * Retrieve the number of database queries during the WordPress execution.
    *
    * @since 2.0.0
    *
    * @global wpdb $wpdb WordPress database abstraction object.
    *
    * @return int Number of database queries.
    */
    function get_num_queries() {
    global $wpdb;
    return $wpdb->num_queries;
    }

    /**
    * Whether input is yes or no.
    *
    * Must be ‘y’ to be true.
    *
    * @since 1.0.0
    *
    * @param string $yn Character string containing either ‘y’ (yes) or ‘n’ (no).
    * @return bool True if yes, false on anything else.
    */
    function bool_from_yn( $yn ) {
    return ( strtolower( $yn ) == ‘y’ );
    }

    /**
    * Load the feed template from the use of an action hook.
    *
    * If the feed action does not have a hook, then the function will die with a
    * message telling the visitor that the feed is not valid.
    *
    * It is better to only have one hook for each feed.
    *
    * @since 2.1.0
    *
    * @global WP_Query $wp_query Used to tell if the use a comment feed.
    */
    function do_feed() {
    global $wp_query;

    $feed = get_query_var( ‘feed’ );

    // Remove the pad, if present.
    $feed = preg_replace( ‘/^_+/’, ”, $feed );

    if ( $feed == ” || $feed == ‘feed’ )
    $feed = get_default_feed();

    if ( ! has_action( “do_feed_{$feed}” ) ) {
    wp_die( __( ‘ERROR: This is not a valid feed template.’ ), ”, array( ‘response’ => 404 ) );
    }

    /**
    * Fires once the given feed is loaded.
    *
    * The dynamic portion of the hook name, $feed, refers to the feed template name.
    * Possible values include: ‘rdf’, ‘rss’, ‘rss2’, and ‘atom’.
    *
    * @since 2.1.0
    * @since 4.4.0 The $feed parameter was added.
    *
    * @param bool $is_comment_feed Whether the feed is a comment feed.
    * @param string $feed The feed name.
    */
    do_action( “do_feed_{$feed}”, $wp_query->is_comment_feed, $feed );
    }

    /**
    * Load the RDF RSS 0.91 Feed template.
    *
    * @since 2.1.0
    *
    * @see load_template()
    */
    function do_feed_rdf() {
    load_template( ABSPATH . WPINC . ‘/feed-rdf.php’ );
    }

    /**
    * Load the RSS 1.0 Feed Template.
    *
    * @since 2.1.0
    *
    * @see load_template()
    */
    function do_feed_rss() {
    load_template( ABSPATH . WPINC . ‘/feed-rss.php’ );
    }

    /**
    * Load either the RSS2 comment feed or the RSS2 posts feed.
    *
    * @since 2.1.0
    *
    * @see load_template()
    *
    * @param bool $for_comments True for the comment feed, false for normal feed.
    */
    function do_feed_rss2( $for_comments ) {
    if ( $for_comments )
    load_template( ABSPATH . WPINC . ‘/feed-rss2-comments.php’ );
    else
    load_template( ABSPATH . WPINC . ‘/feed-rss2.php’ );
    }

    /**
    * Load either Atom comment feed or Atom posts feed.
    *
    * @since 2.1.0
    *
    * @see load_template()
    *
    * @param bool $for_comments True for the comment feed, false for normal feed.
    */
    function do_feed_atom( $for_comments ) {
    if ($for_comments)
    load_template( ABSPATH . WPINC . ‘/feed-atom-comments.php’);
    else
    load_template( ABSPATH . WPINC . ‘/feed-atom.php’ );
    }

    /**
    * Display the robots.txt file content.
    *
    * The echo content should be with usage of the permalinks or for creating the
    * robots.txt file.
    *
    * @since 2.1.0
    */
    function do_robots() {
    header( ‘Content-Type: text/plain; charset=utf-8’ );

    /**
    * Fires when displaying the robots.txt file.
    *
    * @since 2.1.0
    */
    do_action( ‘do_robotstxt’ );

    $output = “User-agent: *\n”;
    $public = get_option( ‘blog_public’ );
    if ( ‘0’ == $public ) {
    $output .= “Disallow: /\n”;
    } else {
    $site_url = parse_url( site_url() );
    $path = ( !empty( $site_url[‘path’] ) ) ? $site_url[‘path’] : ”;
    $output .= “Disallow: $path/wp-admin/\n”;
    $output .= “Allow: $path/wp-admin/admin-ajax.php\n”;
    }

    /**
    * Filters the robots.txt output.
    *
    * @since 3.0.0
    *
    * @param string $output Robots.txt output.
    * @param bool $public Whether the site is considered “public”.
    */
    echo apply_filters( ‘robots_txt’, $output, $public );
    }

    /**
    * Determines whether WordPress is already installed.
    *
    * The cache will be checked first. If you have a cache plugin, which saves
    * the cache values, then this will work. If you use the default WordPress
    * cache, and the database goes away, then you might have problems.
    *
    * Checks for the ‘siteurl’ option for whether WordPress is installed.
    *
    * For more information on this and similar theme functions, check out
    * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
    * Conditional Tags} article in the Theme Developer Handbook.
    *
    * @since 2.1.0
    *
    * @global wpdb $wpdb WordPress database abstraction object.
    *
    * @return bool Whether the site is already installed.
    */
    function is_blog_installed() {
    global $wpdb;

    /*
    * Check cache first. If options table goes away and we have true
    * cached, oh well.
    */
    if ( wp_cache_get( ‘is_blog_installed’ ) )
    return true;

    $suppress = $wpdb->suppress_errors();
    if ( ! wp_installing() ) {
    $alloptions = wp_load_alloptions();
    }
    // If siteurl is not set to autoload, check it specifically
    if ( !isset( $alloptions[‘siteurl’] ) )
    $installed = $wpdb->get_var( “SELECT option_value FROM $wpdb->options WHERE option_name = ‘siteurl'” );
    else
    $installed = $alloptions[‘siteurl’];
    $wpdb->suppress_errors( $suppress );

    $installed = !empty( $installed );
    wp_cache_set( ‘is_blog_installed’, $installed );

    if ( $installed )
    return true;

    // If visiting repair.php, return true and let it take over.
    if ( defined( ‘WP_REPAIRING’ ) )
    return true;

    $suppress = $wpdb->suppress_errors();

    /*
    * Loop over the WP tables. If none exist, then scratch installation is allowed.
    * If one or more exist, suggest table repair since we got here because the
    * options table could not be accessed.
    */
    $wp_tables = $wpdb->tables();
    foreach ( $wp_tables as $table ) {
    // The existence of custom user tables shouldn’t suggest an insane state or prevent a clean installation.
    if ( defined( ‘CUSTOM_USER_TABLE’ ) && CUSTOM_USER_TABLE == $table )
    continue;
    if ( defined( ‘CUSTOM_USER_META_TABLE’ ) && CUSTOM_USER_META_TABLE == $table )
    continue;

    if ( ! $wpdb->get_results( “DESCRIBE $table;” ) )
    continue;

    // One or more tables exist. We are insane.

    wp_load_translations_early();

    // Die with a DB error.
    $wpdb->error = sprintf(
    /* translators: %s: database repair URL */
    __( ‘One or more database tables are unavailable. The database may need to be <a href=”%s”>repaired</a>.’ ),
    ‘maint/repair.php?referrer=is_blog_installed’
    );

    dead_db();
    }

    $wpdb->suppress_errors( $suppress );

    wp_cache_set( ‘is_blog_installed’, false );

    return false;
    }

    /**
    * Retrieve URL with nonce added to URL query.
    *
    * @since 2.0.4
    *
    * @param string $actionurl URL to add nonce action.
    * @param int|string $action Optional. Nonce action name. Default -1.
    * @param string $name Optional. Nonce name. Default ‘_wpnonce’.
    * @return string Escaped URL with nonce action added.
    */
    function wp_nonce_url( $actionurl, $action = -1, $name = ‘_wpnonce’ ) {
    $actionurl = str_replace( ‘&’, ‘&’, $actionurl );
    return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );
    }

    /**
    * Retrieve or display nonce hidden field for forms.
    *
    * The nonce field is used to validate that the contents of the form came from
    * the location on the current site and not somewhere else. The nonce does not
    * offer absolute protection, but should protect against most cases. It is very
    * important to use nonce field in forms.
    *
    * The $action and $name are optional, but if you want to have better security,
    * it is strongly suggested to set those two parameters. It is easier to just
    * call the function without any parameters, because validation of the nonce
    * doesn’t require any parameters, but since crackers know what the default is
    * it won’t be difficult for them to find a way around your nonce and cause
    * damage.
    *
    * The input name will be whatever $name value you gave. The input value will be
    * the nonce creation value.
    *
    * @since 2.0.4
    *
    * @param int|string $action Optional. Action name. Default -1.
    * @param string $name Optional. Nonce name. Default ‘_wpnonce’.
    * @param bool $referer Optional. Whether to set the referer field for validation. Default true.
    * @param bool $echo Optional. Whether to display or return hidden form field. Default true.
    * @return string Nonce field HTML markup.
    */
    function wp_nonce_field( $action = -1, $name = “_wpnonce”, $referer = true , $echo = true ) {
    $name = esc_attr( $name );
    $nonce_field = ‘<input type=”hidden” id=”‘ . $name . ‘” name=”‘ . $name . ‘” value=”‘ . wp_create_nonce( $action ) . ‘” />’;

    if ( $referer )
    $nonce_field .= wp_referer_field( false );

    if ( $echo )
    echo $nonce_field;

    return $nonce_field;
    }

    /**
    * Retrieve or display referer hidden field for forms.
    *
    * The referer link is the current Request URI from the server super global. The
    * input name is ‘_wp_http_referer’, in case you wanted to check manually.
    *
    * @since 2.0.4
    *
    * @param bool $echo Optional. Whether to echo or return the referer field. Default true.
    * @return string Referer field HTML markup.
    */
    function wp_referer_field( $echo = true ) {
    $referer_field = ‘<input type=”hidden” name=”_wp_http_referer” value=”‘. esc_attr( wp_unslash( $_SERVER[‘REQUEST_URI’] ) ) . ‘” />’;

    if ( $echo )
    echo $referer_field;
    return $referer_field;
    }

    /**
    * Retrieve or display original referer hidden field for forms.
    *
    * The input name is ‘_wp_original_http_referer’ and will be either the same
    * value of wp_referer_field(), if that was posted already or it will be the
    * current page, if it doesn’t exist.
    *
    * @since 2.0.4
    *
    * @param bool $echo Optional. Whether to echo the original http referer. Default true.
    * @param string $jump_back_to Optional. Can be ‘previous’ or page you want to jump back to.
    * Default ‘current’.
    * @return string Original referer field.
    */
    function wp_original_referer_field( $echo = true, $jump_back_to = ‘current’ ) {
    if ( ! $ref = wp_get_original_referer() ) {
    $ref = ‘previous’ == $jump_back_to ? wp_get_referer() : wp_unslash( $_SERVER[‘REQUEST_URI’] );
    }
    $orig_referer_field = ‘<input type=”hidden” name=”_wp_original_http_referer” value=”‘ . esc_attr( $ref ) . ‘” />’;
    if ( $echo )
    echo $orig_referer_field;
    return $orig_referer_field;
    }

    /**
    * Retrieve referer from ‘_wp_http_referer’ or HTTP referer.
    *
    * If it’s the same as the current request URL, will return false.
    *
    * @since 2.0.4
    *
    * @return false|string False on failure. Referer URL on success.
    */
    function wp_get_referer() {
    if ( ! function_exists( ‘wp_validate_redirect’ ) ) {
    return false;
    }

    $ref = wp_get_raw_referer();

    if ( $ref && $ref !== wp_unslash( $_SERVER[‘REQUEST_URI’] ) && $ref !== home_url() . wp_unslash( $_SERVER[‘REQUEST_URI’] ) ) {
    return wp_validate_redirect( $ref, false );
    }

    return false;
    }

    /**
    * Retrieves unvalidated referer from ‘_wp_http_referer’ or HTTP referer.
    *
    * Do not use for redirects, use wp_get_referer() instead.
    *
    * @since 4.5.0
    *
    * @return string|false Referer URL on success, false on failure.
    */
    function wp_get_raw_referer() {
    if ( ! empty( $_REQUEST[‘_wp_http_referer’] ) ) {
    return wp_unslash( $_REQUEST[‘_wp_http_referer’] );
    } else if ( ! empty( $_SERVER[‘HTTP_REFERER’] ) ) {
    return wp_unslash( $_SERVER[‘HTTP_REFERER’] );
    }

    return false;
    }

    /**
    * Retrieve original referer that was posted, if it exists.
    *
    * @since 2.0.4
    *
    * @return string|false False if no original referer or original referer if set.
    */
    function wp_get_original_referer() {
    if ( ! empty( $_REQUEST[‘_wp_original_http_referer’] ) && function_exists( ‘wp_validate_redirect’ ) )
    return wp_validate_redirect( wp_unslash( $_REQUEST[‘_wp_original_http_referer’] ), false );
    return false;
    }

    /**
    * Recursive directory creation based on full path.
    *
    * Will attempt to set permissions on folders.
    *
    * @since 2.0.1
    *
    * @param string $target Full path to attempt to create.
    * @return bool Whether the path was created. True if path already exists.
    */
    function wp_mkdir_p( $target ) {
    $wrapper = null;

    // Strip the protocol.
    if ( wp_is_stream( $target ) ) {
    list( $wrapper, $target ) = explode( ‘://’, $target, 2 );
    }

    // From php.net/mkdir user contributed notes.
    $target = str_replace( ‘//’, ‘/’, $target );

    // Put the wrapper back on the target.
    if ( $wrapper !== null ) {
    $target = $wrapper . ‘://’ . $target;
    }

    /*
    * Safe mode fails with a trailing slash under certain PHP versions.
    * Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
    */
    $target = rtrim($target, ‘/’);
    if ( empty($target) )
    $target = ‘/’;

    if ( file_exists( $target ) )
    return @is_dir( $target );

    // We need to find the permissions of the parent folder that exists and inherit that.
    $target_parent = dirname( $target );
    while ( ‘.’ != $target_parent && ! is_dir( $target_parent ) && dirname( $target_parent ) !== $target_parent ) {
    $target_parent = dirname( $target_parent );
    }

    // Get the permission bits.
    if ( $stat = @stat( $target_parent ) ) {
    $dir_perms = $stat[‘mode’] & 0007777;
    } else {
    $dir_perms = 0777;
    }

    if ( @mkdir( $target, $dir_perms, true ) ) {

    /*
    * If a umask is set that modifies $dir_perms, we’ll have to re-set
    * the $dir_perms correctly with chmod()
    */
    if ( $dir_perms != ( $dir_perms & ~umask() ) ) {
    $folder_parts = explode( ‘/’, substr( $target, strlen( $target_parent ) + 1 ) );
    for ( $i = 1, $c = count( $folder_parts ); $i <= $c; $i++ ) {
    @chmod( $target_parent . ‘/’ . implode( ‘/’, array_slice( $folder_parts, 0, $i ) ), $dir_perms );
    }
    }

    return true;
    }

    return false;
    }

    /**
    * Test if a given filesystem path is absolute.
    *
    * For example, ‘/foo/bar’, or ‘c:\windows’.
    *
    * @since 2.5.0
    *
    * @param string $path File path.
    * @return bool True if path is absolute, false is not absolute.
    */
    function path_is_absolute( $path ) {
    /*
    * This is definitive if true but fails if $path does not exist or contains
    * a symbolic link.
    */
    if ( realpath($path) == $path )
    return true;

    if ( strlen($path) == 0 || $path[0] == ‘.’ )
    return false;

    // Windows allows absolute paths like this.
    if ( preg_match(‘#^[a-zA-Z]:\\\\#’, $path) )
    return true;

    // A path starting with / or \ is absolute; anything else is relative.
    return ( $path[0] == ‘/’ || $path[0] == ‘\\’ );
    }

    /**
    * Join two filesystem paths together.
    *
    * For example, ‘give me $path relative to $base’. If the $path is absolute,
    * then it the full path is returned.
    *
    * @since 2.5.0
    *
    * @param string $base Base path.
    * @param string $path Path relative to $base.
    * @return string The path with the base or absolute path.
    */
    function path_join( $base, $path ) {
    if ( path_is_absolute($path) )
    return $path;

    return rtrim($base, ‘/’) . ‘/’ . ltrim($path, ‘/’);
    }

    /**
    * Normalize a filesystem path.
    *
    * On windows systems, replaces backslashes with forward slashes
    * and forces upper-case drive letters.
    * Allows for two leading slashes for Windows network shares, but
    * ensures that all other duplicate slashes are reduced to a single.
    *
    * @since 3.9.0
    * @since 4.4.0 Ensures upper-case drive letters on Windows systems.
    * @since 4.5.0 Allows for Windows network shares.
    * @since 4.9.7 Allows for PHP file wrappers.
    *
    * @param string $path Path to normalize.
    * @return string Normalized path.
    */
    function wp_normalize_path( $path ) {
    $wrapper = ”;
    if ( wp_is_stream( $path ) ) {
    list( $wrapper, $path ) = explode( ‘://’, $path, 2 );
    $wrapper .= ‘://’;
    }

    // Standardise all paths to use /
    $path = str_replace( ‘\\’, ‘/’, $path );

    // Replace multiple slashes down to a singular, allowing for network shares having two slashes.
    $path = preg_replace( ‘|(?<=.)/+|’, ‘/’, $path );

    // Windows paths should uppercase the drive letter
    if ( ‘:’ === substr( $path, 1, 1 ) ) {
    $path = ucfirst( $path );
    }

    return $wrapper . $path;
    }

    /**
    * Determine a writable directory for temporary files.
    *
    * Function’s preference is the return value of sys_get_temp_dir(),
    * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
    * before finally defaulting to /tmp/
    *
    * In the event that this function does not find a writable location,
    * It may be overridden by the WP_TEMP_DIR constant in your wp-config.php file.
    *
    * @since 2.5.0
    *
    * @staticvar string $temp
    *
    * @return string Writable temporary directory.
    */
    function get_temp_dir() {
    static $temp = ”;
    if ( defined(‘WP_TEMP_DIR’) )
    return trailingslashit(WP_TEMP_DIR);

    if ( $temp )
    return trailingslashit( $temp );

    if ( function_exists(‘sys_get_temp_dir’) ) {
    $temp = sys_get_temp_dir();
    if ( @is_dir( $temp ) && wp_is_writable( $temp ) )
    return trailingslashit( $temp );
    }

    $temp = ini_get(‘upload_tmp_dir’);
    if ( @is_dir( $temp ) && wp_is_writable( $temp ) )
    return trailingslashit( $temp );

    $temp = WP_CONTENT_DIR . ‘/’;
    if ( is_dir( $temp ) && wp_is_writable( $temp ) )
    return $temp;

    return ‘/tmp/’;
    }

    /**
    * Determine if a directory is writable.
    *
    * This function is used to work around certain ACL issues in PHP primarily
    * affecting Windows Servers.
    *
    * @since 3.6.0
    *
    * @see win_is_writable()
    *
    * @param string $path Path to check for write-ability.
    * @return bool Whether the path is writable.
    */
    function wp_is_writable( $path ) {
    if ( ‘WIN’ === strtoupper( substr( PHP_OS, 0, 3 ) ) )
    return win_is_writable( $path );
    else
    return @is_writable( $path );
    }

    /**
    * Workaround for Windows bug in is_writable() function
    *
    * PHP has issues with Windows ACL’s for determine if a
    * directory is writable or not, this works around them by
    * checking the ability to open files rather than relying
    * upon PHP to interprate the OS ACL.
    *
    * @since 2.8.0
    *
    * @see https://bugs.php.net/bug.php?id=27609
    * @see https://bugs.php.net/bug.php?id=30931
    *
    * @param string $path Windows path to check for write-ability.
    * @return bool Whether the path is writable.
    */
    function win_is_writable( $path ) {

    if ( $path[strlen( $path ) – 1] == ‘/’ ) { // if it looks like a directory, check a random file within the directory
    return win_is_writable( $path . uniqid( mt_rand() ) . ‘.tmp’);
    } elseif ( is_dir( $path ) ) { // If it’s a directory (and not a file) check a random file within the directory
    return win_is_writable( $path . ‘/’ . uniqid( mt_rand() ) . ‘.tmp’ );
    }
    // check tmp file for read/write capabilities
    $should_delete_tmp_file = !file_exists( $path );
    $f = @fopen( $path, ‘a’ );
    if ( $f === false )
    return false;
    fclose( $f );
    if ( $should_delete_tmp_file )
    unlink( $path );
    return true;
    }

    /**
    * Retrieves uploads directory information.
    *
    * Same as wp_upload_dir() but “light weight” as it doesn’t attempt to create the uploads directory.
    * Intended for use in themes, when only ‘basedir’ and ‘baseurl’ are needed, generally in all cases
    * when not uploading files.
    *
    * @since 4.5.0
    *
    * @see wp_upload_dir()
    *
    * @return array See wp_upload_dir() for description.
    */
    function wp_get_upload_dir() {
    return wp_upload_dir( null, false );
    }

    /**
    * Get an array containing the current upload directory’s path and url.
    *
    * Checks the ‘upload_path’ option, which should be from the web root folder,
    * and if it isn’t empty it will be used. If it is empty, then the path will be
    * ‘WP_CONTENT_DIR/uploads’. If the ‘UPLOADS’ constant is defined, then it will
    * override the ‘upload_path’ option and ‘WP_CONTENT_DIR/uploads’ path.
    *
    * The upload URL path is set either by the ‘upload_url_path’ option or by using
    * the ‘WP_CONTENT_URL’ constant and appending ‘/uploads’ to the path.
    *
    * If the ‘uploads_use_yearmonth_folders’ is set to true (checkbox if checked in
    * the administration settings panel), then the time will be used. The format
    * will be year first and then month.
    *
    * If the path couldn’t be created, then an error will be returned with the key
    * ‘error’ containing the error message. The error suggests that the parent
    * directory is not writable by the server.
    *
    * On success, the returned array will have many indices:
    * ‘path’ – base directory and sub directory or full path to upload directory.
    * ‘url’ – base url and sub directory or absolute URL to upload directory.
    * ‘subdir’ – sub directory if uploads use year/month folders option is on.
    * ‘basedir’ – path without subdir.
    * ‘baseurl’ – URL path without subdir.
    * ‘error’ – false or error message.
    *
    * @since 2.0.0
    * @uses _wp_upload_dir()
    *
    * @staticvar array $cache
    * @staticvar array $tested_paths
    *
    * @param string $time Optional. Time formatted in ‘yyyy/mm’. Default null.
    * @param bool $create_dir Optional. Whether to check and create the uploads directory.
    * Default true for backward compatibility.
    * @param bool $refresh_cache Optional. Whether to refresh the cache. Default false.
    * @return array See above for description.
    */
    function wp_upload_dir( $time = null, $create_dir = true, $refresh_cache = false ) {
    static $cache = array(), $tested_paths = array();

    $key = sprintf( ‘%d-%s’, get_current_blog_id(), (string) $time );

    if ( $refresh_cache || empty( $cache[ $key ] ) ) {
    $cache[ $key ] = _wp_upload_dir( $time );
    }

    /**
    * Filters the uploads directory data.
    *
    * @since 2.0.0
    *
    * @param array $uploads Array of upload directory data with keys of ‘path’,
    * ‘url’, ‘subdir, ‘basedir’, and ‘error’.
    */
    $uploads = apply_filters( ‘upload_dir’, $cache[ $key ] );

    if ( $create_dir ) {
    $path = $uploads[‘path’];

    if ( array_key_exists( $path, $tested_paths ) ) {
    $uploads[‘error’] = $tested_paths[ $path ];
    } else {
    if ( ! wp_mkdir_p( $path ) ) {
    if ( 0 === strpos( $uploads[‘basedir’], ABSPATH ) ) {
    $error_path = str_replace( ABSPATH, ”, $uploads[‘basedir’] ) . $uploads[‘subdir’];
    } else {
    $error_path = basename( $uploads[‘basedir’] ) . $uploads[‘subdir’];
    }

    $uploads[‘error’] = sprintf(
    /* translators: %s: directory path */
    __( ‘Unable to create directory %s. Is its parent directory writable by the server?’ ),
    esc_html( $error_path )
    );
    }

    $tested_paths[ $path ] = $uploads[‘error’];
    }
    }

    return $uploads;
    }

    /**
    * A non-filtered, non-cached version of wp_upload_dir() that doesn’t check the path.
    *
    * @since 4.5.0
    * @access private
    *
    * @param string $time Optional. Time formatted in ‘yyyy/mm’. Default null.
    * @return array See wp_upload_dir()
    */
    function _wp_upload_dir( $time = null ) {
    $siteurl = get_option( ‘siteurl’ );
    $upload_path = trim( get_option( ‘upload_path’ ) );

    if ( empty( $upload_path ) || ‘wp-content/uploads’ == $upload_path ) {
    $dir = WP_CONTENT_DIR . ‘/uploads’;
    } elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
    // $dir is absolute, $upload_path is (maybe) relative to ABSPATH
    $dir = path_join( ABSPATH, $upload_path );
    } else {
    $dir = $upload_path;
    }

    if ( !$url = get_option( ‘upload_url_path’ ) ) {
    if ( empty($upload_path) || ( ‘wp-content/uploads’ == $upload_path ) || ( $upload_path == $dir ) )
    $url = WP_CONTENT_URL . ‘/uploads’;
    else
    $url = trailingslashit( $siteurl ) . $upload_path;
    }

    /*
    * Honor the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
    * We also sometimes obey UPLOADS when rewriting is enabled — see the next block.
    */
    if ( defined( ‘UPLOADS’ ) && ! ( is_multisite() && get_site_option( ‘ms_files_rewriting’ ) ) ) {
    $dir = ABSPATH . UPLOADS;
    $url = trailingslashit( $siteurl ) . UPLOADS;
    }

    // If multisite (and if not the main site in a post-MU network)
    if ( is_multisite() && ! ( is_main_network() && is_main_site() && defined( ‘MULTISITE’ ) ) ) {

    if ( ! get_site_option( ‘ms_files_rewriting’ ) ) {
    /*
    * If ms-files rewriting is disabled (networks created post-3.5), it is fairly
    * straightforward: Append sites/%d if we’re not on the main site (for post-MU
    * networks). (The extra directory prevents a four-digit ID from conflicting with
    * a year-based directory for the main site. But if a MU-era network has disabled
    * ms-files rewriting manually, they don’t need the extra directory, as they never
    * had wp-content/uploads for the main site.)
    */

    if ( defined( ‘MULTISITE’ ) )
    $ms_dir = ‘/sites/’ . get_current_blog_id();
    else
    $ms_dir = ‘/’ . get_current_blog_id();

    $dir .= $ms_dir;
    $url .= $ms_dir;

    } elseif ( defined( ‘UPLOADS’ ) && ! ms_is_switched() ) {
    /*
    * Handle the old-form ms-files.php rewriting if the network still has that enabled.
    * When ms-files rewriting is enabled, then we only listen to UPLOADS when:
    * 1) We are not on the main site in a post-MU network, as wp-content/uploads is used
    * there, and
    * 2) We are not switched, as ms_upload_constants() hardcodes these constants to reflect
    * the original blog ID.
    *
    * Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.
    * (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as
    * as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files
    * rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)
    */

    if ( defined( ‘BLOGUPLOADDIR’ ) )
    $dir = untrailingslashit( BLOGUPLOADDIR );
    else
    $dir = ABSPATH . UPLOADS;
    $url = trailingslashit( $siteurl ) . ‘files’;
    }
    }

    $basedir = $dir;
    $baseurl = $url;

    $subdir = ”;
    if ( get_option( ‘uploads_use_yearmonth_folders’ ) ) {
    // Generate the yearly and monthly dirs
    if ( !$time )
    $time = current_time( ‘mysql’ );
    $y = substr( $time, 0, 4 );
    $m = substr( $time, 5, 2 );
    $subdir = “/$y/$m”;
    }

    $dir .= $subdir;
    $url .= $subdir;

    return array(
    ‘path’ => $dir,
    ‘url’ => $url,
    ‘subdir’ => $subdir,
    ‘basedir’ => $basedir,
    ‘baseurl’ => $baseurl,
    ‘error’ => false,
    );
    }

    /**
    * Get a filename that is sanitized and unique for the given directory.
    *
    * If the filename is not unique, then a number will be added to the filename
    * before the extension, and will continue adding numbers until the filename is
    * unique.
    *
    * The callback is passed three parameters, the first one is the directory, the
    * second is the filename, and the third is the extension.
    *
    * @since 2.5.0
    *
    * @param string $dir Directory.
    * @param string $filename File name.
    * @param callable $unique_filename_callback Callback. Default null.
    * @return string New filename, if given wasn’t unique.
    */
    function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
    // Sanitize the file name before we begin processing.
    $filename = sanitize_file_name($filename);

    // Separate the filename into a name and extension.
    $ext = pathinfo( $filename, PATHINFO_EXTENSION );
    $name = pathinfo( $filename, PATHINFO_BASENAME );
    if ( $ext ) {
    $ext = ‘.’ . $ext;
    }

    // Edge case: if file is named ‘.ext’, treat as an empty name.
    if ( $name === $ext ) {
    $name = ”;
    }

    /*
    * Increment the file number until we have a unique file to save in $dir.
    * Use callback if supplied.
    */
    if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
    $filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
    } else {
    $number = ”;

    // Change ‘.ext’ to lower case.
    if ( $ext && strtolower($ext) != $ext ) {
    $ext2 = strtolower($ext);
    $filename2 = preg_replace( ‘|’ . preg_quote($ext) . ‘$|’, $ext2, $filename );

    // Check for both lower and upper case extension or image sub-sizes may be overwritten.
    while ( file_exists($dir . “/$filename”) || file_exists($dir . “/$filename2”) ) {
    $new_number = (int) $number + 1;
    $filename = str_replace( array( “-$number$ext”, “$number$ext” ), “-$new_number$ext”, $filename );
    $filename2 = str_replace( array( “-$number$ext2”, “$number$ext2” ), “-$new_number$ext2”, $filename2 );
    $number = $new_number;
    }

    /**
    * Filters the result when generating a unique file name.
    *
    * @since 4.5.0
    *
    * @param string $filename Unique file name.
    * @param string $ext File extension, eg. “.png”.
    * @param string $dir Directory path.
    * @param callable|null $unique_filename_callback Callback function that generates the unique file name.
    */
    return apply_filters( ‘wp_unique_filename’, $filename2, $ext, $dir, $unique_filename_callback );
    }

    while ( file_exists( $dir . “/$filename” ) ) {
    $new_number = (int) $number + 1;
    if ( ” == “$number$ext” ) {
    $filename = “$filename-” . $new_number;
    } else {
    $filename = str_replace( array( “-$number$ext”, “$number$ext” ), “-” . $new_number . $ext, $filename );
    }
    $number = $new_number;
    }
    }

    /** This filter is documented in wp-includes/functions.php */
    return apply_filters( ‘wp_unique_filename’, $filename, $ext, $dir, $unique_filename_callback );
    }

    /**
    * Create a file in the upload folder with given content.
    *
    * If there is an error, then the key ‘error’ will exist with the error message.
    * If success, then the key ‘file’ will have the unique file path, the ‘url’ key
    * will have the link to the new file. and the ‘error’ key will be set to false.
    *
    * This function will not move an uploaded file to the upload folder. It will
    * create a new file with the content in $bits parameter. If you move the upload
    * file, read the content of the uploaded file, and then you can give the
    * filename and content to this function, which will add it to the upload
    * folder.
    *
    * The permissions will be set on the new file automatically by this function.
    *
    * @since 2.0.0
    *
    * @param string $name Filename.
    * @param null|string $deprecated Never used. Set to null.
    * @param mixed $bits File content
    * @param string $time Optional. Time formatted in ‘yyyy/mm’. Default null.
    * @return array
    */
    function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
    if ( !empty( $deprecated ) )
    _deprecated_argument( __FUNCTION__, ‘2.0.0’ );

    if ( empty( $name ) )
    return array( ‘error’ => __( ‘Empty filename’ ) );

    $wp_filetype = wp_check_filetype( $name );
    if ( ! $wp_filetype[‘ext’] && ! current_user_can( ‘unfiltered_upload’ ) )
    return array( ‘error’ => __( ‘Sorry, this file type is not permitted for security reasons.’ ) );

    $upload = wp_upload_dir( $time );

    if ( $upload[‘error’] !== false )
    return $upload;

    /**
    * Filters whether to treat the upload bits as an error.
    *
    * Passing a non-array to the filter will effectively short-circuit preparing
    * the upload bits, returning that value instead.
    *
    * @since 3.0.0
    *
    * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return.
    */
    $upload_bits_error = apply_filters( ‘wp_upload_bits’, array( ‘name’ => $name, ‘bits’ => $bits, ‘time’ => $time ) );
    if ( !is_array( $upload_bits_error ) ) {
    $upload[ ‘error’ ] = $upload_bits_error;
    return $upload;
    }

    $filename = wp_unique_filename( $upload[‘path’], $name );

    $new_file = $upload[‘path’] . “/$filename”;
    if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
    if ( 0 === strpos( $upload[‘basedir’], ABSPATH ) )
    $error_path = str_replace( ABSPATH, ”, $upload[‘basedir’] ) . $upload[‘subdir’];
    else
    $error_path = basename( $upload[‘basedir’] ) . $upload[‘subdir’];

    $message = sprintf(
    /* translators: %s: directory path */
    __( ‘Unable to create directory %s. Is its parent directory writable by the server?’ ),
    $error_path
    );
    return array( ‘error’ => $message );
    }

    $ifp = @ fopen( $new_file, ‘wb’ );
    if ( ! $ifp )
    return array( ‘error’ => sprintf( __( ‘Could not write file %s’ ), $new_file ) );

    @fwrite( $ifp, $bits );
    fclose( $ifp );
    clearstatcache();

    // Set correct file permissions
    $stat = @ stat( dirname( $new_file ) );
    $perms = $stat[‘mode’] & 0007777;
    $perms = $perms & 0000666;
    @ chmod( $new_file, $perms );
    clearstatcache();

    // Compute the URL
    $url = $upload[‘url’] . “/$filename”;

    /** This filter is documented in wp-admin/includes/file.php */
    return apply_filters( ‘wp_handle_upload’, array( ‘file’ => $new_file, ‘url’ => $url, ‘type’ => $wp_filetype[‘type’], ‘error’ => false ), ‘sideload’ );
    }

    /**
    * Retrieve the file type based on the extension name.
    *
    * @since 2.5.0
    *
    * @param string $ext The extension to search.
    * @return string|void The file type, example: audio, video, document, spreadsheet, etc.
    */
    function wp_ext2type( $ext ) {
    $ext = strtolower( $ext );

    $ext2type = wp_get_ext_types();
    foreach ( $ext2type as $type => $exts )
    if ( in_array( $ext, $exts ) )
    return $type;
    }

    /**
    * Retrieve the file type from the file name.
    *
    * You can optionally define the mime array, if needed.
    *
    * @since 2.0.4
    *
    * @param string $filename File name or path.
    * @param array $mimes Optional. Key is the file extension with value as the mime type.
    * @return array Values with extension first and mime type.
    */
    function wp_check_filetype( $filename, $mimes = null ) {
    if ( empty($mimes) )
    $mimes = get_allowed_mime_types();
    $type = false;
    $ext = false;

    foreach ( $mimes as $ext_preg => $mime_match ) {
    $ext_preg = ‘!\.(‘ . $ext_preg . ‘)$!i’;
    if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
    $type = $mime_match;
    $ext = $ext_matches[1];
    break;
    }
    }

    return compact( ‘ext’, ‘type’ );
    }

    /**
    * Attempt to determine the real file type of a file.
    *
    * If unable to, the file name extension will be used to determine type.
    *
    * If it’s determined that the extension does not match the file’s real type,
    * then the “proper_filename” value will be set with a proper filename and extension.
    *
    * Currently this function only supports renaming images validated via wp_get_image_mime().
    *
    * @since 3.0.0
    *
    * @param string $file Full path to the file.
    * @param string $filename The name of the file (may differ from $file due to $file being
    * in a tmp directory).
    * @param array $mimes Optional. Key is the file extension with value as the mime type.
    * @return array Values for the extension, MIME, and either a corrected filename or false
    * if original $filename is valid.
    */
    function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
    $proper_filename = false;

    // Do basic extension validation and MIME mapping
    $wp_filetype = wp_check_filetype( $filename, $mimes );
    $ext = $wp_filetype[‘ext’];
    $type = $wp_filetype[‘type’];

    // We can’t do any further validation without a file to work with
    if ( ! file_exists( $file ) ) {
    return compact( ‘ext’, ‘type’, ‘proper_filename’ );
    }

    $real_mime = false;

    // Validate image types.
    if ( $type && 0 === strpos( $type, ‘image/’ ) ) {

    // Attempt to figure out what type of image it actually is
    $real_mime = wp_get_image_mime( $file );

    if ( $real_mime && $real_mime != $type ) {
    /**
    * Filters the list mapping image mime types to their respective extensions.
    *
    * @since 3.0.0
    *
    * @param array $mime_to_ext Array of image mime types and their matching extensions.
    */
    $mime_to_ext = apply_filters( ‘getimagesize_mimes_to_exts’, array(
    ‘image/jpeg’ => ‘jpg’,
    ‘image/png’ => ‘png’,
    ‘image/gif’ => ‘gif’,
    ‘image/bmp’ => ‘bmp’,
    ‘image/tiff’ => ‘tif’,
    ) );

    // Replace whatever is after the last period in the filename with the correct extension
    if ( ! empty( $mime_to_ext[ $real_mime ] ) ) {
    $filename_parts = explode( ‘.’, $filename );
    array_pop( $filename_parts );
    $filename_parts[] = $mime_to_ext[ $real_mime ];
    $new_filename = implode( ‘.’, $filename_parts );

    if ( $new_filename != $filename ) {
    $proper_filename = $new_filename; // Mark that it changed
    }
    // Redefine the extension / MIME
    $wp_filetype = wp_check_filetype( $new_filename, $mimes );
    $ext = $wp_filetype[‘ext’];
    $type = $wp_filetype[‘type’];
    } else {
    // Reset $real_mime and try validating again.
    $real_mime = false;
    }
    }
    }

    // Validate files that didn’t get validated during previous checks.
    if ( $type && ! $real_mime && extension_loaded( ‘fileinfo’ ) ) {
    $finfo = finfo_open( FILEINFO_MIME_TYPE );
    $real_mime = finfo_file( $finfo, $file );
    finfo_close( $finfo );

    // fileinfo often misidentifies obscure files as one of these types
    $nonspecific_types = array(
    ‘application/octet-stream’,
    ‘application/encrypted’,
    ‘application/CDFV2-encrypted’,
    ‘application/zip’,
    );

    /*
    * If $real_mime doesn’t match the content type we’re expecting from the file’s extension,
    * we need to do some additional vetting. Media types and those listed in $nonspecific_types are
    * allowed some leeway, but anything else must exactly match the real content type.
    */
    if ( in_array( $real_mime, $nonspecific_types, true ) ) {
    // File is a non-specific binary type. That’s ok if it’s a type that generally tends to be binary.
    if ( !in_array( substr( $type, 0, strcspn( $type, ‘/’ ) ), array( ‘application’, ‘video’, ‘audio’ ) ) ) {
    $type = $ext = false;
    }
    } elseif ( 0 === strpos( $real_mime, ‘video/’ ) || 0 === strpos( $real_mime, ‘audio/’ ) ) {
    /*
    * For these types, only the major type must match the real value.
    * This means that common mismatches are forgiven: application/vnd.apple.numbers is often misidentified as application/zip,
    * and some media files are commonly named with the wrong extension (.mov instead of .mp4)
    */
    if ( substr( $real_mime, 0, strcspn( $real_mime, ‘/’ ) ) !== substr( $type, 0, strcspn( $type, ‘/’ ) ) ) {
    $type = $ext = false;
    }
    } elseif ( ‘text/plain’ === $real_mime ) {
    // A few common file types are occasionally detected as text/plain; allow those.
    if ( ! in_array(
    $type,
    array(
    ‘text/plain’,
    ‘text/csv’,
    ‘text/richtext’,
    ‘text/tsv’,
    ‘text/vtt’,
    )
    )
    ) {
    $type = $ext = false;
    }
    } elseif ( ‘text/rtf’ === $real_mime ) {
    // Special casing for RTF files.
    if ( ! in_array(
    $type,
    array(
    ‘text/rtf’,
    ‘text/plain’,
    ‘application/rtf’,
    )
    )
    ) {
    $type = $ext = false;
    }
    } else {
    if ( $type !== $real_mime ) {
    /*
    * Everything else including image/* and application/*:
    * If the real content type doesn’t match the file extension, assume it’s dangerous.
    */
    $type = $ext = false;
    }

    }
    }

    // The mime type must be allowed
    if ( $type ) {
    $allowed = get_allowed_mime_types();

    if ( ! in_array( $type, $allowed ) ) {
    $type = $ext = false;
    }
    }

    /**
    * Filters the “real” file type of the given file.
    *
    * @since 3.0.0
    *
    * @param array $wp_check_filetype_and_ext File data array containing ‘ext’, ‘type’, and
    * ‘proper_filename’ keys.
    * @param string $file Full path to the file.
    * @param string $filename The name of the file (may differ from $file due to
    * $file being in a tmp directory).
    * @param array $mimes Key is the file extension with value as the mime type.
    */
    return apply_filters( ‘wp_check_filetype_and_ext’, compact( ‘ext’, ‘type’, ‘proper_filename’ ), $file, $filename, $mimes );
    }

    /**
    * Returns the real mime type of an image file.
    *
    * This depends on exif_imagetype() or getimagesize() to determine real mime types.
    *
    * @since 4.7.1
    *
    * @param string $file Full path to the file.
    * @return string|false The actual mime type or false if the type cannot be determined.
    */
    function wp_get_image_mime( $file ) {
    /*
    * Use exif_imagetype() to check the mimetype if available or fall back to
    * getimagesize() if exif isn’t avaialbe. If either function throws an Exception
    * we assume the file could not be validated.
    */
    try {
    if ( is_callable( ‘exif_imagetype’ ) ) {
    $imagetype = exif_imagetype( $file );
    $mime = ( $imagetype ) ? image_type_to_mime_type( $imagetype ) : false;
    } elseif ( function_exists( ‘getimagesize’ ) ) {
    $imagesize = getimagesize( $file );
    $mime = ( isset( $imagesize[‘mime’] ) ) ? $imagesize[‘mime’] : false;
    } else {
    $mime = false;
    }
    } catch ( Exception $e ) {
    $mime = false;
    }

    return $mime;
    }

    /**
    * Retrieve list of mime types and file extensions.
    *
    * @since 3.5.0
    * @since 4.2.0 Support was added for GIMP (xcf) files.
    *
    * @return array Array of mime types keyed by the file extension regex corresponding to those types.
    */
    function wp_get_mime_types() {
    /**
    * Filters the list of mime types and file extensions.
    *
    * This filter should be used to add, not remove, mime types. To remove
    * mime types, use the {@see ‘upload_mimes’} filter.
    *
    * @since 3.5.0
    *
    * @param array $wp_get_mime_types Mime types keyed by the file extension regex
    * corresponding to those types.
    */
    return apply_filters( ‘mime_types’, array(
    // Image formats.
    ‘jpg|jpeg|jpe’ => ‘image/jpeg’,
    ‘gif’ => ‘image/gif’,
    ‘png’ => ‘image/png’,
    ‘bmp’ => ‘image/bmp’,
    ‘tiff|tif’ => ‘image/tiff’,
    ‘ico’ => ‘image/x-icon’,
    // Video formats.
    ‘asf|asx’ => ‘video/x-ms-asf’,
    ‘wmv’ => ‘video/x-ms-wmv’,
    ‘wmx’ => ‘video/x-ms-wmx’,
    ‘wm’ => ‘video/x-ms-wm’,
    ‘avi’ => ‘video/avi’,
    ‘divx’ => ‘video/divx’,
    ‘flv’ => ‘video/x-flv’,
    ‘mov|qt’ => ‘video/quicktime’,
    ‘mpeg|mpg|mpe’ => ‘video/mpeg’,
    ‘mp4|m4v’ => ‘video/mp4’,
    ‘ogv’ => ‘video/ogg’,
    ‘webm’ => ‘video/webm’,
    ‘mkv’ => ‘video/x-matroska’,
    ‘3gp|3gpp’ => ‘video/3gpp’, // Can also be audio
    ‘3g2|3gp2’ => ‘video/3gpp2’, // Can also be audio
    // Text formats.
    ‘txt|asc|c|cc|h|srt’ => ‘text/plain’,
    ‘csv’ => ‘text/csv’,
    ‘tsv’ => ‘text/tab-separated-values’,
    ‘ics’ => ‘text/calendar’,
    ‘rtx’ => ‘text/richtext’,
    ‘css’ => ‘text/css’,
    ‘htm|html’ => ‘text/html’,
    ‘vtt’ => ‘text/vtt’,
    ‘dfxp’ => ‘application/ttaf+xml’,
    // Audio formats.
    ‘mp3|m4a|m4b’ => ‘audio/mpeg’,
    ‘aac’ => ‘audio/aac’,
    ‘ra|ram’ => ‘audio/x-realaudio’,
    ‘wav’ => ‘audio/wav’,
    ‘ogg|oga’ => ‘audio/ogg’,
    ‘flac’ => ‘audio/flac’,
    ‘mid|midi’ => ‘audio/midi’,
    ‘wma’ => ‘audio/x-ms-wma’,
    ‘wax’ => ‘audio/x-ms-wax’,
    ‘mka’ => ‘audio/x-matroska’,
    // Misc application formats.
    ‘rtf’ => ‘application/rtf’,
    ‘js’ => ‘application/javascript’,
    ‘pdf’ => ‘application/pdf’,
    ‘swf’ => ‘application/x-shockwave-flash’,
    ‘class’ => ‘application/java’,
    ‘tar’ => ‘application/x-tar’,
    ‘zip’ => ‘application/zip’,
    ‘gz|gzip’ => ‘application/x-gzip’,
    ‘rar’ => ‘application/rar’,
    ‘7z’ => ‘application/x-7z-compressed’,
    ‘exe’ => ‘application/x-msdownload’,
    ‘psd’ => ‘application/octet-stream’,
    ‘xcf’ => ‘application/octet-stream’,
    // MS Office formats.
    ‘doc’ => ‘application/msword’,
    ‘pot|pps|ppt’ => ‘application/vnd.ms-powerpoint’,
    ‘wri’ => ‘application/vnd.ms-write’,
    ‘xla|xls|xlt|xlw’ => ‘application/vnd.ms-excel’,
    ‘mdb’ => ‘application/vnd.ms-access’,
    ‘mpp’ => ‘application/vnd.ms-project’,
    ‘docx’ => ‘application/vnd.openxmlformats-officedocument.wordprocessingml.document’,
    ‘docm’ => ‘application/vnd.ms-word.document.macroEnabled.12’,
    ‘dotx’ => ‘application/vnd.openxmlformats-officedocument.wordprocessingml.template’,
    ‘dotm’ => ‘application/vnd.ms-word.template.macroEnabled.12’,
    ‘xlsx’ => ‘application/vnd.openxmlformats-officedocument.spreadsheetml.sheet’,
    ‘xlsm’ => ‘application/vnd.ms-excel.sheet.macroEnabled.12’,
    ‘xlsb’ => ‘application/vnd.ms-excel.sheet.binary.macroEnabled.12’,
    ‘xltx’ => ‘application/vnd.openxmlformats-officedocument.spreadsheetml.template’,
    ‘xltm’ => ‘application/vnd.ms-excel.template.macroEnabled.12’,
    ‘xlam’ => ‘application/vnd.ms-excel.addin.macroEnabled.12’,
    ‘pptx’ => ‘application/vnd.openxmlformats-officedocument.presentationml.presentation’,
    ‘pptm’ => ‘application/vnd.ms-powerpoint.presentation.macroEnabled.12’,
    ‘ppsx’ => ‘application/vnd.openxmlformats-officedocument.presentationml.slideshow’,
    ‘ppsm’ => ‘application/vnd.ms-powerpoint.slideshow.macroEnabled.12’,
    ‘potx’ => ‘application/vnd.openxmlformats-officedocument.presentationml.template’,
    ‘potm’ => ‘application/vnd.ms-powerpoint.template.macroEnabled.12’,
    ‘ppam’ => ‘application/vnd.ms-powerpoint.addin.macroEnabled.12’,
    ‘sldx’ => ‘application/vnd.openxmlformats-officedocument.presentationml.slide’,
    ‘sldm’ => ‘application/vnd.ms-powerpoint.slide.macroEnabled.12’,
    ‘onetoc|onetoc2|onetmp|onepkg’ => ‘application/onenote’,
    ‘oxps’ => ‘application/oxps’,
    ‘xps’ => ‘application/vnd.ms-xpsdocument’,
    // OpenOffice formats.
    ‘odt’ => ‘application/vnd.oasis.opendocument.text’,
    ‘odp’ => ‘application/vnd.oasis.opendocument.presentation’,
    ‘ods’ => ‘application/vnd.oasis.opendocument.spreadsheet’,
    ‘odg’ => ‘application/vnd.oasis.opendocument.graphics’,
    ‘odc’ => ‘application/vnd.oasis.opendocument.chart’,
    ‘odb’ => ‘application/vnd.oasis.opendocument.database’,
    ‘odf’ => ‘application/vnd.oasis.opendocument.formula’,
    // WordPerfect formats.
    ‘wp|wpd’ => ‘application/wordperfect’,
    // iWork formats.
    ‘key’ => ‘application/vnd.apple.keynote’,
    ‘numbers’ => ‘application/vnd.apple.numbers’,
    ‘pages’ => ‘application/vnd.apple.pages’,
    ) );
    }

    /**
    * Retrieves the list of common file extensions and their types.
    *
    * @since 4.6.0
    *
    * @return array Array of file extensions types keyed by the type of file.
    */
    function wp_get_ext_types() {

    /**
    * Filters file type based on the extension name.
    *
    * @since 2.5.0
    *
    * @see wp_ext2type()
    *
    * @param array $ext2type Multi-dimensional array with extensions for a default set
    * of file types.
    */
    return apply_filters( ‘ext2type’, array(
    ‘image’ => array( ‘jpg’, ‘jpeg’, ‘jpe’, ‘gif’, ‘png’, ‘bmp’, ‘tif’, ‘tiff’, ‘ico’ ),
    ‘audio’ => array( ‘aac’, ‘ac3’, ‘aif’, ‘aiff’, ‘flac’, ‘m3a’, ‘m4a’, ‘m4b’, ‘mka’, ‘mp1’, ‘mp2’, ‘mp3’, ‘ogg’, ‘oga’, ‘ram’, ‘wav’, ‘wma’ ),
    ‘video’ => array( ‘3g2’, ‘3gp’, ‘3gpp’, ‘asf’, ‘avi’, ‘divx’, ‘dv’, ‘flv’, ‘m4v’, ‘mkv’, ‘mov’, ‘mp4’, ‘mpeg’, ‘mpg’, ‘mpv’, ‘ogm’, ‘ogv’, ‘qt’, ‘rm’, ‘vob’, ‘wmv’ ),
    ‘document’ => array( ‘doc’, ‘docx’, ‘docm’, ‘dotm’, ‘odt’, ‘pages’, ‘pdf’, ‘xps’, ‘oxps’, ‘rtf’, ‘wp’, ‘wpd’, ‘psd’, ‘xcf’ ),
    ‘spreadsheet’ => array( ‘numbers’, ‘ods’, ‘xls’, ‘xlsx’, ‘xlsm’, ‘xlsb’ ),
    ‘interactive’ => array( ‘swf’, ‘key’, ‘ppt’, ‘pptx’, ‘pptm’, ‘pps’, ‘ppsx’, ‘ppsm’, ‘sldx’, ‘sldm’, ‘odp’ ),
    ‘text’ => array( ‘asc’, ‘csv’, ‘tsv’, ‘txt’ ),
    ‘archive’ => array( ‘bz2’, ‘cab’, ‘dmg’, ‘gz’, ‘rar’, ‘sea’, ‘sit’, ‘sqx’, ‘tar’, ‘tgz’, ‘zip’, ‘7z’ ),
    ‘code’ => array( ‘css’, ‘htm’, ‘html’, ‘php’, ‘js’ ),
    ) );
    }

    /**
    * Retrieve list of allowed mime types and file extensions.
    *
    * @since 2.8.6
    *
    * @param int|WP_User $user Optional. User to check. Defaults to current user.
    * @return array Array of mime types keyed by the file extension regex corresponding
    * to those types.
    */
    function get_allowed_mime_types( $user = null ) {
    $t = wp_get_mime_types();

    unset( $t[‘swf’], $t[‘exe’] );
    if ( function_exists( ‘current_user_can’ ) )
    $unfiltered = $user ? user_can( $user, ‘unfiltered_html’ ) : current_user_can( ‘unfiltered_html’ );

    if ( empty( $unfiltered ) ) {
    unset( $t[‘htm|html’], $t[‘js’] );
    }

    /**
    * Filters list of allowed mime types and file extensions.
    *
    * @since 2.0.0
    *
    * @param array $t Mime types keyed by the file extension regex corresponding to
    * those types. ‘swf’ and ‘exe’ removed from full list. ‘htm|html’ also
    * removed depending on ‘$user’ capabilities.
    * @param int|WP_User|null $user User ID, User object or null if not provided (indicates current user).
    */
    return apply_filters( ‘upload_mimes’, $t, $user );
    }

    /**
    * Display “Are You Sure” message to confirm the action being taken.
    *
    * If the action has the nonce explain message, then it will be displayed
    * along with the “Are you sure?” message.
    *
    * @since 2.0.4
    *
    * @param string $action The nonce action.
    */
    function wp_nonce_ays( $action ) {
    if ( ‘log-out’ == $action ) {
    $html = sprintf(
    /* translators: %s: site name */
    __( ‘You are attempting to log out of %s’ ),
    get_bloginfo( ‘name’ )
    );
    $html .= ‘</p><p>’;
    $redirect_to = isset( $_REQUEST[‘redirect_to’] ) ? $_REQUEST[‘redirect_to’] : ”;
    $html .= sprintf(
    /* translators: %s: logout URL */
    __( ‘Do you really want to <a href=”%s”>log out</a>?’ ),
    wp_logout_url( $redirect_to )
    );
    } else {
    $html = __( ‘The link you followed has expired.’ );
    if ( wp_get_referer() ) {
    $html .= ‘</p><p>’;
    $html .= sprintf( ‘<a href=”%s”>%s</a>’,
    esc_url( remove_query_arg( ‘updated’, wp_get_referer() ) ),
    __( ‘Please try again.’ )
    );
    }
    }

    wp_die( $html, __( ‘Something went wrong.’ ), 403 );
    }

    /**
    * Kill WordPress execution and display HTML message with error message.
    *
    * This function complements the die() PHP function. The difference is that
    * HTML will be displayed to the user. It is recommended to use this function
    * only when the execution should not continue any further. It is not recommended
    * to call this function very often, and try to handle as many errors as possible
    * silently or more gracefully.
    *
    * As a shorthand, the desired HTTP response code may be passed as an integer to
    * the $title parameter (the default title would apply) or the $args parameter.
    *
    * @since 2.0.4
    * @since 4.1.0 The $title and $args parameters were changed to optionally accept
    * an integer to be used as the response code.
    *
    * @param string|WP_Error $message Optional. Error message. If this is a WP_Error object,
    * and not an Ajax or XML-RPC request, the error’s messages are used.
    * Default empty.
    * @param string|int $title Optional. Error title. If $message is a WP_Error object,
    * error data with the key ‘title’ may be used to specify the title.
    * If $title is an integer, then it is treated as the response
    * code. Default empty.
    * @param string|array|int $args {
    * Optional. Arguments to control behavior. If $args is an integer, then it is treated
    * as the response code. Default empty array.
    *
    * @type int $response The HTTP response code. Default 200 for Ajax requests, 500 otherwise.
    * @type bool $back_link Whether to include a link to go back. Default false.
    * @type string $text_direction The text direction. This is only useful internally, when WordPress
    * is still loading and the site’s locale is not set up yet. Accepts ‘rtl’.
    * Default is the value of is_rtl().
    * }
    */
    function wp_die( $message = ”, $title = ”, $args = array() ) {

    if ( is_int( $args ) ) {
    $args = array( ‘response’ => $args );
    } elseif ( is_int( $title ) ) {
    $args = array( ‘response’ => $title );
    $title = ”;
    }

    if ( wp_doing_ajax() ) {
    /**
    * Filters the callback for killing WordPress execution for Ajax requests.
    *
    * @since 3.4.0
    *
    * @param callable $function Callback function name.
    */
    $function = apply_filters( ‘wp_die_ajax_handler’, ‘_ajax_wp_die_handler’ );
    } elseif ( defined( ‘XMLRPC_REQUEST’ ) && XMLRPC_REQUEST ) {
    /**
    * Filters the callback for killing WordPress execution for XML-RPC requests.
    *
    * @since 3.4.0
    *
    * @param callable $function Callback function name.
    */
    $function = apply_filters( ‘wp_die_xmlrpc_handler’, ‘_xmlrpc_wp_die_handler’ );
    } else {
    /**
    * Filters the callback for killing WordPress execution for all non-Ajax, non-XML-RPC requests.
    *
    * @since 3.0.0
    *
    * @param callable $function Callback function name.
    */
    $function = apply_filters( ‘wp_die_handler’, ‘_default_wp_die_handler’ );
    }

    call_user_func( $function, $message, $title, $args );
    }

    /**
    * Kills WordPress execution and display HTML message with error message.
    *
    * This is the default handler for wp_die if you want a custom one for your
    * site then you can overload using the {@see ‘wp_die_handler’} filter in wp_die().
    *
    * @since 3.0.0
    * @access private
    *
    * @param string|WP_Error $message Error message or WP_Error object.
    * @param string $title Optional. Error title. Default empty.
    * @param string|array $args Optional. Arguments to control behavior. Default empty array.
    */
    function _default_wp_die_handler( $message, $title = ”, $args = array() ) {
    $defaults = array( ‘response’ => 500 );
    $r = wp_parse_args($args, $defaults);

    $have_gettext = function_exists(‘__’);

    if ( function_exists( ‘is_wp_error’ ) && is_wp_error( $message ) ) {
    if ( empty( $title ) ) {
    $error_data = $message->get_error_data();
    if ( is_array( $error_data ) && isset( $error_data[‘title’] ) )
    $title = $error_data[‘title’];
    }
    $errors = $message->get_error_messages();
    switch ( count( $errors ) ) {
    case 0 :
    $message = ”;
    break;
    case 1 :
    $message = “<p>{$errors[0]}</p>”;
    break;
    default :
    $message = “<ul>\n\t\t<li>” . join( “</li>\n\t\t<li>”, $errors ) . “</li>\n\t</ul>”;
    break;
    }
    } elseif ( is_string( $message ) ) {
    $message = “<p>$message</p>”;
    }

    if ( isset( $r[‘back_link’] ) && $r[‘back_link’] ) {
    $back_text = $have_gettext? __(‘« Back’) : ‘« Back’;
    $message .= “\n<p><a href=’javascript:history.back()’>$back_text</a></p>”;
    }

    if ( ! did_action( ‘admin_head’ ) ) :
    if ( !headers_sent() ) {
    status_header( $r[‘response’] );
    nocache_headers();
    header( ‘Content-Type: text/html; charset=utf-8’ );
    }

    if ( empty($title) )
    $title = $have_gettext ? __(‘WordPress › Error’) : ‘WordPress › Error’;

    $text_direction = ‘ltr’;
    if ( isset($r[‘text_direction’]) && ‘rtl’ == $r[‘text_direction’] )
    $text_direction = ‘rtl’;
    elseif ( function_exists( ‘is_rtl’ ) && is_rtl() )
    $text_direction = ‘rtl’;
    ?>
    <!DOCTYPE html>
    <html xmlns=”http://www.w3.org/1999/xhtml&#8221; <?php if ( function_exists( ‘language_attributes’ ) && function_exists( ‘is_rtl’ ) ) language_attributes(); else echo “dir=’$text_direction'”; ?>>
    <head>
    <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
    <meta name=”viewport” content=”width=device-width”>
    <?php
    if ( function_exists( ‘wp_no_robots’ ) ) {
    wp_no_robots();
    }
    ?>
    <title><?php echo $title ?></title>
    <style type=”text/css”>
    html {
    background: #f1f1f1;
    }
    body {
    background: #fff;
    color: #444;
    font-family: -apple-system, BlinkMacSystemFont, “Segoe UI”, Roboto, Oxygen-Sans, Ubuntu, Cantarell, “Helvetica Neue”, sans-serif;
    margin: 2em auto;
    padding: 1em 2em;
    max-width: 700px;
    -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.13);
    box-shadow: 0 1px 3px rgba(0,0,0,0.13);
    }
    h1 {
    border-bottom: 1px solid #dadada;
    clear: both;
    color: #666;
    font-size: 24px;
    margin: 30px 0 0 0;
    padding: 0;
    padding-bottom: 7px;
    }
    #error-page {
    margin-top: 50px;
    }
    #error-page p {
    font-size: 14px;
    line-height: 1.5;
    margin: 25px 0 20px;
    }
    #error-page code {
    font-family: Consolas, Monaco, monospace;
    }
    ul li {
    margin-bottom: 10px;
    font-size: 14px ;
    }
    a {
    color: #0073aa;
    }
    a:hover,
    a:active {
    color: #00a0d2;
    }
    a:focus {
    color: #124964;
    -webkit-box-shadow:
    0 0 0 1px #5b9dd9,
    0 0 2px 1px rgba(30, 140, 190, .8);
    box-shadow:
    0 0 0 1px #5b9dd9,
    0 0 2px 1px rgba(30, 140, 190, .8);
    outline: none;
    }
    .button {
    background: #f7f7f7;
    border: 1px solid #ccc;
    color: #555;
    display: inline-block;
    text-decoration: none;
    font-size: 13px;
    line-height: 26px;
    height: 28px;
    margin: 0;
    padding: 0 10px 1px;
    cursor: pointer;
    -webkit-border-radius: 3px;
    -webkit-appearance: none;
    border-radius: 3px;
    white-space: nowrap;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;

    -webkit-box-shadow: 0 1px 0 #ccc;
    box-shadow: 0 1px 0 #ccc;
    vertical-align: top;
    }

    .button.button-large {
    height: 30px;
    line-height: 28px;
    padding: 0 12px 2px;
    }

    .button:hover,
    .button:focus {
    background: #fafafa;
    border-color: #999;
    color: #23282d;
    }

    .button:focus {
    border-color: #5b9dd9;
    -webkit-box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
    box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
    outline: none;
    }

    .button:active {
    background: #eee;
    border-color: #999;
    -webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
    box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
    -webkit-transform: translateY(1px);
    -ms-transform: translateY(1px);
    transform: translateY(1px);
    }

    <?php
    if ( ‘rtl’ == $text_direction ) {
    echo ‘body { font-family: Tahoma, Arial; }’;
    }
    ?>
    </style>
    </head>
    <body id=”error-page”>
    <?php endif; // ! did_action( ‘admin_head’ ) ?>
    <?php echo $message; ?>
    </body>
    </html>
    <?php
    die();
    }

    /**
    * Kill WordPress execution and display XML message with error message.
    *
    * This is the handler for wp_die when processing XMLRPC requests.
    *
    * @since 3.2.0
    * @access private
    *
    * @global wp_xmlrpc_server $wp_xmlrpc_server
    *
    * @param string $message Error message.
    * @param string $title Optional. Error title. Default empty.
    * @param string|array $args Optional. Arguments to control behavior. Default empty array.
    */
    function _xmlrpc_wp_die_handler( $message, $title = ”, $args = array() ) {
    global $wp_xmlrpc_server;
    $defaults = array( ‘response’ => 500 );

    $r = wp_parse_args($args, $defaults);

    if ( $wp_xmlrpc_server ) {
    $error = new IXR_Error( $r[‘response’] , $message);
    $wp_xmlrpc_server->output( $error->getXml() );
    }
    die();
    }

    /**
    * Kill WordPress ajax execution.
    *
    * This is the handler for wp_die when processing Ajax requests.
    *
    * @since 3.4.0
    * @access private
    *
    * @param string $message Error message.
    * @param string $title Optional. Error title (unused). Default empty.
    * @param string|array $args Optional. Arguments to control behavior. Default empty array.
    */
    function _ajax_wp_die_handler( $message, $title = ”, $args = array() ) {
    $defaults = array(
    ‘response’ => 200,
    );
    $r = wp_parse_args( $args, $defaults );

    if ( ! headers_sent() && null !== $r[‘response’] ) {
    status_header( $r[‘response’] );
    }

    if ( is_scalar( $message ) )
    die( (string) $message );
    die( ‘0’ );
    }

    /**
    * Kill WordPress execution.
    *
    * This is the handler for wp_die when processing APP requests.
    *
    * @since 3.4.0
    * @access private
    *
    * @param string $message Optional. Response to print. Default empty.
    */
    function _scalar_wp_die_handler( $message = ” ) {
    if ( is_scalar( $message ) )
    die( (string) $message );
    die();
    }

    /**
    * Encode a variable into JSON, with some sanity checks.
    *
    * @since 4.1.0
    *
    * @param mixed $data Variable (usually an array or object) to encode as JSON.
    * @param int $options Optional. Options to be passed to json_encode(). Default 0.
    * @param int $depth Optional. Maximum depth to walk through $data. Must be
    * greater than 0. Default 512.
    * @return string|false The JSON encoded string, or false if it cannot be encoded.
    */
    function wp_json_encode( $data, $options = 0, $depth = 512 ) {
    /*
    * json_encode() has had extra params added over the years.
    * $options was added in 5.3, and $depth in 5.5.
    * We need to make sure we call it with the correct arguments.
    */
    if ( version_compare( PHP_VERSION, ‘5.5’, ‘>=’ ) ) {
    $args = array( $data, $options, $depth );
    } elseif ( version_compare( PHP_VERSION, ‘5.3’, ‘>=’ ) ) {
    $args = array( $data, $options );
    } else {
    $args = array( $data );
    }

    // Prepare the data for JSON serialization.
    $args[0] = _wp_json_prepare_data( $data );

    $json = @call_user_func_array( ‘json_encode’, $args );

    // If json_encode() was successful, no need to do more sanity checking.
    // … unless we’re in an old version of PHP, and json_encode() returned
    // a string containing ‘null’. Then we need to do more sanity checking.
    if ( false !== $json && ( version_compare( PHP_VERSION, ‘5.5’, ‘>=’ ) || false === strpos( $json, ‘null’ ) ) ) {
    return $json;
    }

    try {
    $args[0] = _wp_json_sanity_check( $data, $depth );
    } catch ( Exception $e ) {
    return false;
    }

    return call_user_func_array( ‘json_encode’, $args );
    }

    /**
    * Perform sanity checks on data that shall be encoded to JSON.
    *
    * @ignore
    * @since 4.1.0
    * @access private
    *
    * @see wp_json_encode()
    *
    * @param mixed $data Variable (usually an array or object) to encode as JSON.
    * @param int $depth Maximum depth to walk through $data. Must be greater than 0.
    * @return mixed The sanitized data that shall be encoded to JSON.
    */
    function _wp_json_sanity_check( $data, $depth ) {
    if ( $depth < 0 ) {
    throw new Exception( ‘Reached depth limit’ );
    }

    if ( is_array( $data ) ) {
    $output = array();
    foreach ( $data as $id => $el ) {
    // Don’t forget to sanitize the ID!
    if ( is_string( $id ) ) {
    $clean_id = _wp_json_convert_string( $id );
    } else {
    $clean_id = $id;
    }

    // Check the element type, so that we’re only recursing if we really have to.
    if ( is_array( $el ) || is_object( $el ) ) {
    $output[ $clean_id ] = _wp_json_sanity_check( $el, $depth – 1 );
    } elseif ( is_string( $el ) ) {
    $output[ $clean_id ] = _wp_json_convert_string( $el );
    } else {
    $output[ $clean_id ] = $el;
    }
    }
    } elseif ( is_object( $data ) ) {
    $output = new stdClass;
    foreach ( $data as $id => $el ) {
    if ( is_string( $id ) ) {
    $clean_id = _wp_json_convert_string( $id );
    } else {
    $clean_id = $id;
    }

    if ( is_array( $el ) || is_object( $el ) ) {
    $output->$clean_id = _wp_json_sanity_check( $el, $depth – 1 );
    } elseif ( is_string( $el ) ) {
    $output->$clean_id = _wp_json_convert_string( $el );
    } else {
    $output->$clean_id = $el;
    }
    }
    } elseif ( is_string( $data ) ) {
    return _wp_json_convert_string( $data );
    } else {
    return $data;
    }

    return $output;
    }

    /**
    * Convert a string to UTF-8, so that it can be safely encoded to JSON.
    *
    * @ignore
    * @since 4.1.0
    * @access private
    *
    * @see _wp_json_sanity_check()
    *
    * @staticvar bool $use_mb
    *
    * @param string $string The string which is to be converted.
    * @return string The checked string.
    */
    function _wp_json_convert_string( $string ) {
    static $use_mb = null;
    if ( is_null( $use_mb ) ) {
    $use_mb = function_exists( ‘mb_convert_encoding’ );
    }

    if ( $use_mb ) {
    $encoding = mb_detect_encoding( $string, mb_detect_order(), true );
    if ( $encoding ) {
    return mb_convert_encoding( $string, ‘UTF-8’, $encoding );
    } else {
    return mb_convert_encoding( $string, ‘UTF-8’, ‘UTF-8’ );
    }
    } else {
    return wp_check_invalid_utf8( $string, true );
    }
    }

    /**
    * Prepares response data to be serialized to JSON.
    *
    * This supports the JsonSerializable interface for PHP 5.2-5.3 as well.
    *
    * @ignore
    * @since 4.4.0
    * @access private
    *
    * @param mixed $data Native representation.
    * @return bool|int|float|null|string|array Data ready for json_encode().
    */
    function _wp_json_prepare_data( $data ) {
    if ( ! defined( ‘WP_JSON_SERIALIZE_COMPATIBLE’ ) || WP_JSON_SERIALIZE_COMPATIBLE === false ) {
    return $data;
    }

    switch ( gettype( $data ) ) {
    case ‘boolean’:
    case ‘integer’:
    case ‘double’:
    case ‘string’:
    case ‘NULL’:
    // These values can be passed through.
    return $data;

    case ‘array’:
    // Arrays must be mapped in case they also return objects.
    return array_map( ‘_wp_json_prepare_data’, $data );

    case ‘object’:
    // If this is an incomplete object (__PHP_Incomplete_Class), bail.
    if ( ! is_object( $data ) ) {
    return null;
    }

    if ( $data instanceof JsonSerializable ) {
    $data = $data->jsonSerialize();
    } else {
    $data = get_object_vars( $data );
    }

    // Now, pass the array (or whatever was returned from jsonSerialize through).
    return _wp_json_prepare_data( $data );

    default:
    return null;
    }
    }

    /**
    * Send a JSON response back to an Ajax request.
    *
    * @since 3.5.0
    * @since 4.7.0 The $status_code parameter was added.
    *
    * @param mixed $response Variable (usually an array or object) to encode as JSON,
    * then print and die.
    * @param int $status_code The HTTP status code to output.
    */
    function wp_send_json( $response, $status_code = null ) {
    @header( ‘Content-Type: application/json; charset=’ . get_option( ‘blog_charset’ ) );
    if ( null !== $status_code ) {
    status_header( $status_code );
    }
    echo wp_json_encode( $response );

    if ( wp_doing_ajax() ) {
    wp_die( ”, ”, array(
    ‘response’ => null,
    ) );
    } else {
    die;
    }
    }

    /**
    * Send a JSON response back to an Ajax request, indicating success.
    *
    * @since 3.5.0
    * @since 4.7.0 The $status_code parameter was added.
    *
    * @param mixed $data Data to encode as JSON, then print and die.
    * @param int $status_code The HTTP status code to output.
    */
    function wp_send_json_success( $data = null, $status_code = null ) {
    $response = array( ‘success’ => true );

    if ( isset( $data ) )
    $response[‘data’] = $data;

    wp_send_json( $response, $status_code );
    }

    /**
    * Send a JSON response back to an Ajax request, indicating failure.
    *
    * If the $data parameter is a WP_Error object, the errors
    * within the object are processed and output as an array of error
    * codes and corresponding messages. All other types are output
    * without further processing.
    *
    * @since 3.5.0
    * @since 4.1.0 The $data parameter is now processed if a WP_Error object is passed in.
    * @since 4.7.0 The $status_code parameter was added.
    *
    * @param mixed $data Data to encode as JSON, then print and die.
    * @param int $status_code The HTTP status code to output.
    */
    function wp_send_json_error( $data = null, $status_code = null ) {
    $response = array( ‘success’ => false );

    if ( isset( $data ) ) {
    if ( is_wp_error( $data ) ) {
    $result = array();
    foreach ( $data->errors as $code => $messages ) {
    foreach ( $messages as $message ) {
    $result[] = array( ‘code’ => $code, ‘message’ => $message );
    }
    }

    $response[‘data’] = $result;
    } else {
    $response[‘data’] = $data;
    }
    }

    wp_send_json( $response, $status_code );
    }

    /**
    * Checks that a JSONP callback is a valid JavaScript callback.
    *
    * Only allows alphanumeric characters and the dot character in callback
    * function names. This helps to mitigate XSS attacks caused by directly
    * outputting user input.
    *
    * @since 4.6.0
    *
    * @param string $callback Supplied JSONP callback function.
    * @return bool True if valid callback, otherwise false.
    */
    function wp_check_jsonp_callback( $callback ) {
    if ( ! is_string( $callback ) ) {
    return false;
    }

    preg_replace( ‘/[^\w\.]/’, ”, $callback, -1, $illegal_char_count );

    return 0 === $illegal_char_count;
    }

    /**
    * Retrieve the WordPress home page URL.
    *
    * If the constant named ‘WP_HOME’ exists, then it will be used and returned
    * by the function. This can be used to counter the redirection on your local
    * development environment.
    *
    * @since 2.2.0
    * @access private
    *
    * @see WP_HOME
    *
    * @param string $url URL for the home location.
    * @return string Homepage location.
    */
    function _config_wp_home( $url = ” ) {
    if ( defined( ‘WP_HOME’ ) )
    return untrailingslashit( WP_HOME );
    return $url;
    }

    /**
    * Retrieve the WordPress site URL.
    *
    * If the constant named ‘WP_SITEURL’ is defined, then the value in that
    * constant will always be returned. This can be used for debugging a site
    * on your localhost while not having to change the database to your URL.
    *
    * @since 2.2.0
    * @access private
    *
    * @see WP_SITEURL
    *
    * @param string $url URL to set the WordPress site location.
    * @return string The WordPress Site URL.
    */
    function _config_wp_siteurl( $url = ” ) {
    if ( defined( ‘WP_SITEURL’ ) )
    return untrailingslashit( WP_SITEURL );
    return $url;
    }

    /**
    * Delete the fresh site option.
    *
    * @since 4.7.0
    * @access private
    */
    function _delete_option_fresh_site() {
    update_option( ‘fresh_site’, ‘0’ );
    }

    /**
    * Set the localized direction for MCE plugin.
    *
    * Will only set the direction to ‘rtl’, if the WordPress locale has
    * the text direction set to ‘rtl’.
    *
    * Fills in the ‘directionality’ setting, enables the ‘directionality’
    * plugin, and adds the ‘ltr’ button to ‘toolbar1’, formerly
    * ‘theme_advanced_buttons1’ array keys. These keys are then returned
    * in the $mce_init (TinyMCE settings) array.
    *
    * @since 2.1.0
    * @access private
    *
    * @param array $mce_init MCE settings array.
    * @return array Direction set for ‘rtl’, if needed by locale.
    */
    function _mce_set_direction( $mce_init ) {
    if ( is_rtl() ) {
    $mce_init[‘directionality’] = ‘rtl’;
    $mce_init[‘rtl_ui’] = true;

    if ( ! empty( $mce_init[‘plugins’] ) && strpos( $mce_init[‘plugins’], ‘directionality’ ) === false ) {
    $mce_init[‘plugins’] .= ‘,directionality’;
    }

    if ( ! empty( $mce_init[‘toolbar1’] ) && ! preg_match( ‘/\bltr\b/’, $mce_init[‘toolbar1’] ) ) {
    $mce_init[‘toolbar1’] .= ‘,ltr’;
    }
    }

    return $mce_init;
    }

    /**
    * Convert smiley code to the icon graphic file equivalent.
    *
    * You can turn off smilies, by going to the write setting screen and unchecking
    * the box, or by setting ‘use_smilies’ option to false or removing the option.
    *
    * Plugins may override the default smiley list by setting the $wpsmiliestrans
    * to an array, with the key the code the blogger types in and the value the
    * image file.
    *
    * The $wp_smiliessearch global is for the regular expression and is set each
    * time the function is called.
    *
    * The full list of smilies can be found in the function and won’t be listed in
    * the description. Probably should create a Codex page for it, so that it is
    * available.
    *
    * @global array $wpsmiliestrans
    * @global array $wp_smiliessearch
    *
    * @since 2.2.0
    */
    function smilies_init() {
    global $wpsmiliestrans, $wp_smiliessearch;

    // don’t bother setting up smilies if they are disabled
    if ( !get_option( ‘use_smilies’ ) )
    return;

    if ( !isset( $wpsmiliestrans ) ) {
    $wpsmiliestrans = array(
    ‘:mrgreen:’ => ‘mrgreen.png’,
    ‘:neutral:’ => “\xf0\x9f\x98\x90”,
    ‘:twisted:’ => “\xf0\x9f\x98\x88”,
    ‘:arrow:’ => “\xe2\x9e\xa1”,
    ‘:shock:’ => “\xf0\x9f\x98\xaf”,
    ‘:smile:’ => “\xf0\x9f\x99\x82”,
    ‘:???:’ => “\xf0\x9f\x98\x95”,
    ‘:cool:’ => “\xf0\x9f\x98\x8e”,
    ‘:evil:’ => “\xf0\x9f\x91\xbf”,
    ‘:grin:’ => “\xf0\x9f\x98\x80”,
    ‘:idea:’ => “\xf0\x9f\x92\xa1”,
    ‘:oops:’ => “\xf0\x9f\x98\xb3”,
    ‘:razz:’ => “\xf0\x9f\x98\x9b”,
    ‘:roll:’ => “\xf0\x9f\x99\x84”,
    ‘:wink:’ => “\xf0\x9f\x98\x89”,
    ‘:cry:’ => “\xf0\x9f\x98\xa5”,
    ‘:eek:’ => “\xf0\x9f\x98\xae”,
    ‘:lol:’ => “\xf0\x9f\x98\x86”,
    ‘:mad:’ => “\xf0\x9f\x98\xa1”,
    ‘:sad:’ => “\xf0\x9f\x99\x81”,
    ‘8-)’ => “\xf0\x9f\x98\x8e”,
    ‘8-O’ => “\xf0\x9f\x98\xaf”,
    ‘:-(‘ => “\xf0\x9f\x99\x81”,
    ‘:-)’ => “\xf0\x9f\x99\x82”,
    ‘:-?’ => “\xf0\x9f\x98\x95”,
    ‘:-D’ => “\xf0\x9f\x98\x80”,
    ‘:-P’ => “\xf0\x9f\x98\x9b”,
    ‘:-o’ => “\xf0\x9f\x98\xae”,
    ‘:-x’ => “\xf0\x9f\x98\xa1”,
    ‘:-|’ => “\xf0\x9f\x98\x90”,
    ‘;-)’ => “\xf0\x9f\x98\x89”,
    // This one transformation breaks regular text with frequency.
    // ‘8)’ => “\xf0\x9f\x98\x8e”,
    ‘8O’ => “\xf0\x9f\x98\xaf”,
    ‘:(‘ => “\xf0\x9f\x99\x81”,
    ‘:)’ => “\xf0\x9f\x99\x82”,
    ‘:?’ => “\xf0\x9f\x98\x95”,
    ‘:D’ => “\xf0\x9f\x98\x80”,
    ‘:P’ => “\xf0\x9f\x98\x9b”,
    ‘:o’ => “\xf0\x9f\x98\xae”,
    ‘:x’ => “\xf0\x9f\x98\xa1”,
    ‘:|’ => “\xf0\x9f\x98\x90”,
    ‘;)’ => “\xf0\x9f\x98\x89”,
    ‘:!:’ => “\xe2\x9d\x97”,
    ‘:?:’ => “\xe2\x9d\x93”,
    );
    }

    /**
    * Filters all the smilies.
    *
    * This filter must be added before smilies_init is run, as
    * it is normally only run once to setup the smilies regex.
    *
    * @since 4.7.0
    *
    * @param array $wpsmiliestrans List of the smilies.
    */
    $wpsmiliestrans = apply_filters(‘smilies’, $wpsmiliestrans);

    if (count($wpsmiliestrans) == 0) {
    return;
    }

    /*
    * NOTE: we sort the smilies in reverse key order. This is to make sure
    * we match the longest possible smilie (:???: vs :?) as the regular
    * expression used below is first-match
    */
    krsort($wpsmiliestrans);

    $spaces = wp_spaces_regexp();

    // Begin first “subpattern”
    $wp_smiliessearch = ‘/(?<=’ . $spaces . ‘|^)’;

    $subchar = ”;
    foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
    $firstchar = substr($smiley, 0, 1);
    $rest = substr($smiley, 1);

    // new subpattern?
    if ($firstchar != $subchar) {
    if ($subchar != ”) {
    $wp_smiliessearch .= ‘)(?=’ . $spaces . ‘|$)’; // End previous “subpattern”
    $wp_smiliessearch .= ‘|(?<=’ . $spaces . ‘|^)’; // Begin another “subpattern”
    }
    $subchar = $firstchar;
    $wp_smiliessearch .= preg_quote($firstchar, ‘/’) . ‘(?:’;
    } else {
    $wp_smiliessearch .= ‘|’;
    }
    $wp_smiliessearch .= preg_quote($rest, ‘/’);
    }

    $wp_smiliessearch .= ‘)(?=’ . $spaces . ‘|$)/m’;

    }

    /**
    * Merge user defined arguments into defaults array.
    *
    * This function is used throughout WordPress to allow for both string or array
    * to be merged into another array.
    *
    * @since 2.2.0
    * @since 2.3.0 $args can now also be an object.
    *
    * @param string|array|object $args Value to merge with $defaults.
    * @param array $defaults Optional. Array that serves as the defaults. Default empty.
    * @return array Merged user defined values with defaults.
    */
    function wp_parse_args( $args, $defaults = ” ) {
    if ( is_object( $args ) )
    $r = get_object_vars( $args );
    elseif ( is_array( $args ) )
    $r =& $args;
    else
    wp_parse_str( $args, $r );

    if ( is_array( $defaults ) )
    return array_merge( $defaults, $r );
    return $r;
    }

    /**
    * Clean up an array, comma- or space-separated list of IDs.
    *
    * @since 3.0.0
    *
    * @param array|string $list List of ids.
    * @return array Sanitized array of IDs.
    */
    function wp_parse_id_list( $list ) {
    if ( !is_array($list) )
    $list = preg_split(‘/[\s,]+/’, $list);

    return array_unique(array_map(‘absint’, $list));
    }

    /**
    * Clean up an array, comma- or space-separated list of slugs.
    *
    * @since 4.7.0
    *
    * @param array|string $list List of slugs.
    * @return array Sanitized array of slugs.
    */
    function wp_parse_slug_list( $list ) {
    if ( ! is_array( $list ) ) {
    $list = preg_split( ‘/[\s,]+/’, $list );
    }

    foreach ( $list as $key => $value ) {
    $list[ $key ] = sanitize_title( $value );
    }

    return array_unique( $list );
    }

    /**
    * Extract a slice of an array, given a list of keys.
    *
    * @since 3.1.0
    *
    * @param array $array The original array.
    * @param array $keys The list of keys.
    * @return array The array slice.
    */
    function wp_array_slice_assoc( $array, $keys ) {
    $slice = array();
    foreach ( $keys as $key )
    if ( isset( $array[ $key ] ) )
    $slice[ $key ] = $array[ $key ];

    return $slice;
    }

    /**
    * Determines if the variable is a numeric-indexed array.
    *
    * @since 4.4.0
    *
    * @param mixed $data Variable to check.
    * @return bool Whether the variable is a list.
    */
    function wp_is_numeric_array( $data ) {
    if ( ! is_array( $data ) ) {
    return false;
    }

    $keys = array_keys( $data );
    $string_keys = array_filter( $keys, ‘is_string’ );
    return count( $string_keys ) === 0;
    }

    /**
    * Filters a list of objects, based on a set of key => value arguments.
    *
    * @since 3.0.0
    * @since 4.7.0 Uses WP_List_Util class.
    *
    * @param array $list An array of objects to filter
    * @param array $args Optional. An array of key => value arguments to match
    * against each object. Default empty array.
    * @param string $operator Optional. The logical operation to perform. ‘or’ means
    * only one element from the array needs to match; ‘and’
    * means all elements must match; ‘not’ means no elements may
    * match. Default ‘and’.
    * @param bool|string $field A field from the object to place instead of the entire object.
    * Default false.
    * @return array A list of objects or object fields.
    */
    function wp_filter_object_list( $list, $args = array(), $operator = ‘and’, $field = false ) {
    if ( ! is_array( $list ) ) {
    return array();
    }

    $util = new WP_List_Util( $list );

    $util->filter( $args, $operator );

    if ( $field ) {
    $util->pluck( $field );
    }

    return $util->get_output();
    }

    /**
    * Filters a list of objects, based on a set of key => value arguments.
    *
    * @since 3.1.0
    * @since 4.7.0 Uses WP_List_Util class.
    *
    * @param array $list An array of objects to filter.
    * @param array $args Optional. An array of key => value arguments to match
    * against each object. Default empty array.
    * @param string $operator Optional. The logical operation to perform. ‘AND’ means
    * all elements from the array must match. ‘OR’ means only
    * one element needs to match. ‘NOT’ means no elements may
    * match. Default ‘AND’.
    * @return array Array of found values.
    */
    function wp_list_filter( $list, $args = array(), $operator = ‘AND’ ) {
    if ( ! is_array( $list ) ) {
    return array();
    }

    $util = new WP_List_Util( $list );
    return $util->filter( $args, $operator );
    }

    /**
    * Pluck a certain field out of each object in a list.
    *
    * This has the same functionality and prototype of
    * array_column() (PHP 5.5) but also supports objects.
    *
    * @since 3.1.0
    * @since 4.0.0 $index_key parameter added.
    * @since 4.7.0 Uses WP_List_Util class.
    *
    * @param array $list List of objects or arrays
    * @param int|string $field Field from the object to place instead of the entire object
    * @param int|string $index_key Optional. Field from the object to use as keys for the new array.
    * Default null.
    * @return array Array of found values. If $index_key is set, an array of found values with keys
    * corresponding to $index_key. If $index_key is null, array keys from the original
    * $list will be preserved in the results.
    */
    function wp_list_pluck( $list, $field, $index_key = null ) {
    $util = new WP_List_Util( $list );
    return $util->pluck( $field, $index_key );
    }

    /**
    * Sorts a list of objects, based on one or more orderby arguments.
    *
    * @since 4.7.0
    *
    * @param array $list An array of objects to filter.
    * @param string|array $orderby Optional. Either the field name to order by or an array
    * of multiple orderby fields as $orderby => $order.
    * @param string $order Optional. Either ‘ASC’ or ‘DESC’. Only used if $orderby
    * is a string.
    * @param bool $preserve_keys Optional. Whether to preserve keys. Default false.
    * @return array The sorted array.
    */
    function wp_list_sort( $list, $orderby = array(), $order = ‘ASC’, $preserve_keys = false ) {
    if ( ! is_array( $list ) ) {
    return array();
    }

    $util = new WP_List_Util( $list );
    return $util->sort( $orderby, $order, $preserve_keys );
    }

    /**
    * Determines if Widgets library should be loaded.
    *
    * Checks to make sure that the widgets library hasn’t already been loaded.
    * If it hasn’t, then it will load the widgets library and run an action hook.
    *
    * @since 2.2.0
    */
    function wp_maybe_load_widgets() {
    /**
    * Filters whether to load the Widgets library.
    *
    * Passing a falsey value to the filter will effectively short-circuit
    * the Widgets library from loading.
    *
    * @since 2.8.0
    *
    * @param bool $wp_maybe_load_widgets Whether to load the Widgets library.
    * Default true.
    */
    if ( ! apply_filters( ‘load_default_widgets’, true ) ) {
    return;
    }

    require_once( ABSPATH . WPINC . ‘/default-widgets.php’ );

    add_action( ‘_admin_menu’, ‘wp_widgets_add_menu’ );
    }

    /**
    * Append the Widgets menu to the themes main menu.
    *
    * @since 2.2.0
    *
    * @global array $submenu
    */
    function wp_widgets_add_menu() {
    global $submenu;

    if ( ! current_theme_supports( ‘widgets’ ) )
    return;

    $submenu[‘themes.php’][7] = array( __( ‘Widgets’ ), ‘edit_theme_options’, ‘widgets.php’ );
    ksort( $submenu[‘themes.php’], SORT_NUMERIC );
    }

    /**
    * Flush all output buffers for PHP 5.2.
    *
    * Make sure all output buffers are flushed before our singletons are destroyed.
    *
    * @since 2.2.0
    */
    function wp_ob_end_flush_all() {
    $levels = ob_get_level();
    for ($i=0; $i<$levels; $i++)
    ob_end_flush();
    }

    /**
    * Load custom DB error or display WordPress DB error.
    *
    * If a file exists in the wp-content directory named db-error.php, then it will
    * be loaded instead of displaying the WordPress DB error. If it is not found,
    * then the WordPress DB error will be displayed instead.
    *
    * The WordPress DB error sets the HTTP status header to 500 to try to prevent
    * search engines from caching the message. Custom DB messages should do the
    * same.
    *
    * This function was backported to WordPress 2.3.2, but originally was added
    * in WordPress 2.5.0.
    *
    * @since 2.3.2
    *
    * @global wpdb $wpdb WordPress database abstraction object.
    */
    function dead_db() {
    global $wpdb;

    wp_load_translations_early();

    // Load custom DB error template, if present.
    if ( file_exists( WP_CONTENT_DIR . ‘/db-error.php’ ) ) {
    require_once( WP_CONTENT_DIR . ‘/db-error.php’ );
    die();
    }

    // If installing or in the admin, provide the verbose message.
    if ( wp_installing() || defined( ‘WP_ADMIN’ ) )
    wp_die($wpdb->error);

    // Otherwise, be terse.
    status_header( 500 );
    nocache_headers();
    header( ‘Content-Type: text/html; charset=utf-8’ );
    ?>
    <!DOCTYPE html>
    <html xmlns=”http://www.w3.org/1999/xhtml”&lt;?php if ( is_rtl() ) echo ‘ dir=”rtl”‘; ?>>
    <head>
    <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
    <title><?php _e( ‘Database Error’ ); ?></title>

    </head>
    <body>
    <h1><?php _e( ‘Error establishing a database connection’ ); ?></h1>
    </body>
    </html>
    <?php
    die();
    }

    /**
    * Convert a value to non-negative integer.
    *
    * @since 2.5.0
    *
    * @param mixed $maybeint Data you wish to have converted to a non-negative integer.
    * @return int A non-negative integer.
    */
    function absint( $maybeint ) {
    return abs( intval( $maybeint ) );
    }

    /**
    * Mark a function as deprecated and inform when it has been used.
    *
    * There is a {@see ‘hook deprecated_function_run’} that will be called that can be used
    * to get the backtrace up to what file and function called the deprecated
    * function.
    *
    * The current behavior is to trigger a user error if WP_DEBUG is true.
    *
    * This function is to be used in every function that is deprecated.
    *
    * @since 2.5.0
    * @access private
    *
    * @param string $function The function that was called.
    * @param string $version The version of WordPress that deprecated the function.
    * @param string $replacement Optional. The function that should have been called. Default null.
    */
    function _deprecated_function( $function, $version, $replacement = null ) {

    /**
    * Fires when a deprecated function is called.
    *
    * @since 2.5.0
    *
    * @param string $function The function that was called.
    * @param string $replacement The function that should have been called.
    * @param string $version The version of WordPress that deprecated the function.
    */
    do_action( ‘deprecated_function_run’, $function, $replacement, $version );

    /**
    * Filters whether to trigger an error for deprecated functions.
    *
    * @since 2.5.0
    *
    * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
    */
    if ( WP_DEBUG && apply_filters( ‘deprecated_function_trigger_error’, true ) ) {
    if ( function_exists( ‘__’ ) ) {
    if ( ! is_null( $replacement ) ) {
    /* translators: 1: PHP function name, 2: version number, 3: alternative function name */
    trigger_error( sprintf( __(‘%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’), $function, $version, $replacement ) );
    } else {
    /* translators: 1: PHP function name, 2: version number */
    trigger_error( sprintf( __(‘%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.’), $function, $version ) );
    }
    } else {
    if ( ! is_null( $replacement ) ) {
    trigger_error( sprintf( ‘%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’, $function, $version, $replacement ) );
    } else {
    trigger_error( sprintf( ‘%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.’, $function, $version ) );
    }
    }
    }
    }

    /**
    * Marks a constructor as deprecated and informs when it has been used.
    *
    * Similar to _deprecated_function(), but with different strings. Used to
    * remove PHP4 style constructors.
    *
    * The current behavior is to trigger a user error if WP_DEBUG is true.
    *
    * This function is to be used in every PHP4 style constructor method that is deprecated.
    *
    * @since 4.3.0
    * @since 4.5.0 Added the $parent_class parameter.
    *
    * @access private
    *
    * @param string $class The class containing the deprecated constructor.
    * @param string $version The version of WordPress that deprecated the function.
    * @param string $parent_class Optional. The parent class calling the deprecated constructor.
    * Default empty string.
    */
    function _deprecated_constructor( $class, $version, $parent_class = ” ) {

    /**
    * Fires when a deprecated constructor is called.
    *
    * @since 4.3.0
    * @since 4.5.0 Added the $parent_class parameter.
    *
    * @param string $class The class containing the deprecated constructor.
    * @param string $version The version of WordPress that deprecated the function.
    * @param string $parent_class The parent class calling the deprecated constructor.
    */
    do_action( ‘deprecated_constructor_run’, $class, $version, $parent_class );

    /**
    * Filters whether to trigger an error for deprecated functions.
    *
    * WP_DEBUG must be true in addition to the filter evaluating to true.
    *
    * @since 4.3.0
    *
    * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
    */
    if ( WP_DEBUG && apply_filters( ‘deprecated_constructor_trigger_error’, true ) ) {
    if ( function_exists( ‘__’ ) ) {
    if ( ! empty( $parent_class ) ) {
    /* translators: 1: PHP class name, 2: PHP parent class name, 3: version number, 4: __construct() method */
    trigger_error( sprintf( __( ‘The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.’ ),
    $class, $parent_class, $version, ‘<pre>__construct()</pre>’ ) );
    } else {
    /* translators: 1: PHP class name, 2: version number, 3: __construct() method */
    trigger_error( sprintf( __( ‘The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’ ),
    $class, $version, ‘<pre>__construct()</pre>’ ) );
    }
    } else {
    if ( ! empty( $parent_class ) ) {
    trigger_error( sprintf( ‘The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.’,
    $class, $parent_class, $version, ‘<pre>__construct()</pre>’ ) );
    } else {
    trigger_error( sprintf( ‘The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’,
    $class, $version, ‘<pre>__construct()</pre>’ ) );
    }
    }
    }

    }

    /**
    * Mark a file as deprecated and inform when it has been used.
    *
    * There is a hook {@see ‘deprecated_file_included’} that will be called that can be used
    * to get the backtrace up to what file and function included the deprecated
    * file.
    *
    * The current behavior is to trigger a user error if WP_DEBUG is true.
    *
    * This function is to be used in every file that is deprecated.
    *
    * @since 2.5.0
    * @access private
    *
    * @param string $file The file that was included.
    * @param string $version The version of WordPress that deprecated the file.
    * @param string $replacement Optional. The file that should have been included based on ABSPATH.
    * Default null.
    * @param string $message Optional. A message regarding the change. Default empty.
    */
    function _deprecated_file( $file, $version, $replacement = null, $message = ” ) {

    /**
    * Fires when a deprecated file is called.
    *
    * @since 2.5.0
    *
    * @param string $file The file that was called.
    * @param string $replacement The file that should have been included based on ABSPATH.
    * @param string $version The version of WordPress that deprecated the file.
    * @param string $message A message regarding the change.
    */
    do_action( ‘deprecated_file_included’, $file, $replacement, $version, $message );

    /**
    * Filters whether to trigger an error for deprecated files.
    *
    * @since 2.5.0
    *
    * @param bool $trigger Whether to trigger the error for deprecated files. Default true.
    */
    if ( WP_DEBUG && apply_filters( ‘deprecated_file_trigger_error’, true ) ) {
    $message = empty( $message ) ? ” : ‘ ‘ . $message;
    if ( function_exists( ‘__’ ) ) {
    if ( ! is_null( $replacement ) ) {
    /* translators: 1: PHP file name, 2: version number, 3: alternative file name */
    trigger_error( sprintf( __(‘%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’), $file, $version, $replacement ) . $message );
    } else {
    /* translators: 1: PHP file name, 2: version number */
    trigger_error( sprintf( __(‘%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.’), $file, $version ) . $message );
    }
    } else {
    if ( ! is_null( $replacement ) ) {
    trigger_error( sprintf( ‘%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’, $file, $version, $replacement ) . $message );
    } else {
    trigger_error( sprintf( ‘%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.’, $file, $version ) . $message );
    }
    }
    }
    }
    /**
    * Mark a function argument as deprecated and inform when it has been used.
    *
    * This function is to be used whenever a deprecated function argument is used.
    * Before this function is called, the argument must be checked for whether it was
    * used by comparing it to its default value or evaluating whether it is empty.
    * For example:
    *
    * if ( ! empty( $deprecated ) ) {
    * _deprecated_argument( __FUNCTION__, ‘3.0.0’ );
    * }
    *
    *
    * There is a hook deprecated_argument_run that will be called that can be used
    * to get the backtrace up to what file and function used the deprecated
    * argument.
    *
    * The current behavior is to trigger a user error if WP_DEBUG is true.
    *
    * @since 3.0.0
    * @access private
    *
    * @param string $function The function that was called.
    * @param string $version The version of WordPress that deprecated the argument used.
    * @param string $message Optional. A message regarding the change. Default null.
    */
    function _deprecated_argument( $function, $version, $message = null ) {

    /**
    * Fires when a deprecated argument is called.
    *
    * @since 3.0.0
    *
    * @param string $function The function that was called.
    * @param string $message A message regarding the change.
    * @param string $version The version of WordPress that deprecated the argument used.
    */
    do_action( ‘deprecated_argument_run’, $function, $message, $version );

    /**
    * Filters whether to trigger an error for deprecated arguments.
    *
    * @since 3.0.0
    *
    * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true.
    */
    if ( WP_DEBUG && apply_filters( ‘deprecated_argument_trigger_error’, true ) ) {
    if ( function_exists( ‘__’ ) ) {
    if ( ! is_null( $message ) ) {
    /* translators: 1: PHP function name, 2: version number, 3: optional message regarding the change */
    trigger_error( sprintf( __(‘%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s’), $function, $version, $message ) );
    } else {
    /* translators: 1: PHP function name, 2: version number */
    trigger_error( sprintf( __(‘%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.’), $function, $version ) );
    }
    } else {
    if ( ! is_null( $message ) ) {
    trigger_error( sprintf( ‘%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s’, $function, $version, $message ) );
    } else {
    trigger_error( sprintf( ‘%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.’, $function, $version ) );
    }
    }
    }
    }

    /**
    * Marks a deprecated action or filter hook as deprecated and throws a notice.
    *
    * Use the {@see ‘deprecated_hook_run’} action to get the backtrace describing where
    * the deprecated hook was called.
    *
    * Default behavior is to trigger a user error if WP_DEBUG is true.
    *
    * This function is called by the do_action_deprecated() and apply_filters_deprecated()
    * functions, and so generally does not need to be called directly.
    *
    * @since 4.6.0
    * @access private
    *
    * @param string $hook The hook that was used.
    * @param string $version The version of WordPress that deprecated the hook.
    * @param string $replacement Optional. The hook that should have been used.
    * @param string $message Optional. A message regarding the change.
    */
    function _deprecated_hook( $hook, $version, $replacement = null, $message = null ) {
    /**
    * Fires when a deprecated hook is called.
    *
    * @since 4.6.0
    *
    * @param string $hook The hook that was called.
    * @param string $replacement The hook that should be used as a replacement.
    * @param string $version The version of WordPress that deprecated the argument used.
    * @param string $message A message regarding the change.
    */
    do_action( ‘deprecated_hook_run’, $hook, $replacement, $version, $message );

    /**
    * Filters whether to trigger deprecated hook errors.
    *
    * @since 4.6.0
    *
    * @param bool $trigger Whether to trigger deprecated hook errors. Requires
    * WP_DEBUG to be defined true.
    */
    if ( WP_DEBUG && apply_filters( ‘deprecated_hook_trigger_error’, true ) ) {
    $message = empty( $message ) ? ” : ‘ ‘ . $message;
    if ( ! is_null( $replacement ) ) {
    /* translators: 1: WordPress hook name, 2: version number, 3: alternative hook name */
    trigger_error( sprintf( __( ‘%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.’ ), $hook, $version, $replacement ) . $message );
    } else {
    /* translators: 1: WordPress hook name, 2: version number */
    trigger_error( sprintf( __( ‘%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.’ ), $hook, $version ) . $message );
    }
    }
    }

    /**
    * Mark something as being incorrectly called.
    *
    * There is a hook {@see ‘doing_it_wrong_run’} that will be called that can be used
    * to get the backtrace up to what file and function called the deprecated
    * function.
    *
    * The current behavior is to trigger a user error if WP_DEBUG is true.
    *
    * @since 3.1.0
    * @access private
    *
    * @param string $function The function that was called.
    * @param string $message A message explaining what has been done incorrectly.
    * @param string $version The version of WordPress where the message was added.
    */
    function _doing_it_wrong( $function, $message, $version ) {

    /**
    * Fires when the given function is being used incorrectly.
    *
    * @since 3.1.0
    *
    * @param string $function The function that was called.
    * @param string $message A message explaining what has been done incorrectly.
    * @param string $version The version of WordPress where the message was added.
    */
    do_action( ‘doing_it_wrong_run’, $function, $message, $version );

    /**
    * Filters whether to trigger an error for _doing_it_wrong() calls.
    *
    * @since 3.1.0
    *
    * @param bool $trigger Whether to trigger the error for _doing_it_wrong() calls. Default true.
    */
    if ( WP_DEBUG && apply_filters( ‘doing_it_wrong_trigger_error’, true ) ) {
    if ( function_exists( ‘__’ ) ) {
    if ( is_null( $version ) ) {
    $version = ”;
    } else {
    /* translators: %s: version number */
    $version = sprintf( __( ‘(This message was added in version %s.)’ ), $version );
    }
    /* translators: %s: Codex URL */
    $message .= ‘ ‘ . sprintf( __( ‘Please see <a href=”%s”>Debugging in WordPress</a> for more information.’ ),
    __( ‘https://codex.wordpress.org/Debugging_in_WordPress&#8217; )
    );
    /* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: Version information message */
    trigger_error( sprintf( __( ‘%1$s was called <strong>incorrectly</strong>. %2$s %3$s’ ), $function, $message, $version ) );
    } else {
    if ( is_null( $version ) ) {
    $version = ”;
    } else {
    $version = sprintf( ‘(This message was added in version %s.)’, $version );
    }
    $message .= sprintf( ‘ Please see <a href=”%s”>Debugging in WordPress</a> for more information.’,
    https://codex.wordpress.org/Debugging_in_WordPress&#8217;
    );
    trigger_error( sprintf( ‘%1$s was called <strong>incorrectly</strong>. %2$s %3$s’, $function, $message, $version ) );
    }
    }
    }

    /**
    * Is the server running earlier than 1.5.0 version of lighttpd?
    *
    * @since 2.5.0
    *
    * @return bool Whether the server is running lighttpd < 1.5.0.
    */
    function is_lighttpd_before_150() {
    $server_parts = explode( ‘/’, isset( $_SERVER[‘SERVER_SOFTWARE’] )? $_SERVER[‘SERVER_SOFTWARE’] : ” );
    $server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : ”;
    return ‘lighttpd’ == $server_parts[0] && -1 == version_compare( $server_parts[1], ‘1.5.0’ );
    }

    /**
    * Does the specified module exist in the Apache config?
    *
    * @since 2.5.0
    *
    * @global bool $is_apache
    *
    * @param string $mod The module, e.g. mod_rewrite.
    * @param bool $default Optional. The default return value if the module is not found. Default false.
    * @return bool Whether the specified module is loaded.
    */
    function apache_mod_loaded($mod, $default = false) {
    global $is_apache;

    if ( !$is_apache )
    return false;

    if ( function_exists( ‘apache_get_modules’ ) ) {
    $mods = apache_get_modules();
    if ( in_array($mod, $mods) )
    return true;
    } elseif ( function_exists( ‘phpinfo’ ) && false === strpos( ini_get( ‘disable_functions’ ), ‘phpinfo’ ) ) {
    ob_start();
    phpinfo(8);
    $phpinfo = ob_get_clean();
    if ( false !== strpos($phpinfo, $mod) )
    return true;
    }
    return $default;
    }

    /**
    * Check if IIS 7+ supports pretty permalinks.
    *
    * @since 2.8.0
    *
    * @global bool $is_iis7
    *
    * @return bool Whether IIS7 supports permalinks.
    */
    function iis7_supports_permalinks() {
    global $is_iis7;

    $supports_permalinks = false;
    if ( $is_iis7 ) {
    /* First we check if the DOMDocument class exists. If it does not exist, then we cannot
    * easily update the xml configuration file, hence we just bail out and tell user that
    * pretty permalinks cannot be used.
    *
    * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
    * URL Rewrite 1.1 is loaded it always sets a server variable called ‘IIS_UrlRewriteModule’.
    * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
    * via ISAPI then pretty permalinks will not work.
    */
    $supports_permalinks = class_exists( ‘DOMDocument’, false ) && isset($_SERVER[‘IIS_UrlRewriteModule’]) && ( PHP_SAPI == ‘cgi-fcgi’ );
    }

    /**
    * Filters whether IIS 7+ supports pretty permalinks.
    *
    * @since 2.8.0
    *
    * @param bool $supports_permalinks Whether IIS7 supports permalinks. Default false.
    */
    return apply_filters( ‘iis7_supports_permalinks’, $supports_permalinks );
    }

    /**
    * Validates a file name and path against an allowed set of rules.
    *
    * A return value of 1 means the file path contains directory traversal.
    *
    * A return value of 2 means the file path contains a Windows drive path.
    *
    * A return value of 3 means the file is not in the allowed files list.
    *
    * @since 1.2.0
    *
    * @param string $file File path.
    * @param array $allowed_files Optional. List of allowed files.
    * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
    */
    function validate_file( $file, $allowed_files = array() ) {
    // ../ on its own is not allowed:
    if ( ‘../’ === $file ) {
    return 1;
    }

    // More than one occurence of ../ is not allowed:
    if ( preg_match_all( ‘#\.\./#’, $file, $matches, PREG_SET_ORDER ) && ( count( $matches ) > 1 ) ) {
    return 1;
    }

    // ../ which does not occur at the end of the path is not allowed:
    if ( false !== strpos( $file, ‘../’ ) && ‘../’ !== mb_substr( $file, -3, 3 ) ) {
    return 1;
    }

    // Files not in the allowed file list are not allowed:
    if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
    return 3;

    // Absolute Windows drive paths are not allowed:
    if (‘:’ == substr( $file, 1, 1 ) )
    return 2;

    return 0;
    }

    /**
    * Whether to force SSL used for the Administration Screens.
    *
    * @since 2.6.0
    *
    * @staticvar bool $forced
    *
    * @param string|bool $force Optional. Whether to force SSL in admin screens. Default null.
    * @return bool True if forced, false if not forced.
    */
    function force_ssl_admin( $force = null ) {
    static $forced = false;

    if ( !is_null( $force ) ) {
    $old_forced = $forced;
    $forced = $force;
    return $old_forced;
    }

    return $forced;
    }

    /**
    * Guess the URL for the site.
    *
    * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
    * directory.
    *
    * @since 2.6.0
    *
    * @return string The guessed URL.
    */
    function wp_guess_url() {
    if ( defined(‘WP_SITEURL’) && ” != WP_SITEURL ) {
    $url = WP_SITEURL;
    } else {
    $abspath_fix = str_replace( ‘\\’, ‘/’, ABSPATH );
    $script_filename_dir = dirname( $_SERVER[‘SCRIPT_FILENAME’] );

    // The request is for the admin
    if ( strpos( $_SERVER[‘REQUEST_URI’], ‘wp-admin’ ) !== false || strpos( $_SERVER[‘REQUEST_URI’], ‘wp-login.php’ ) !== false ) {
    $path = preg_replace( ‘#/(wp-admin/.*|wp-login.php)#i’, ”, $_SERVER[‘REQUEST_URI’] );

    // The request is for a file in ABSPATH
    } elseif ( $script_filename_dir . ‘/’ == $abspath_fix ) {
    // Strip off any file/query params in the path
    $path = preg_replace( ‘#/[^/]*$#i’, ”, $_SERVER[‘PHP_SELF’] );

    } else {
    if ( false !== strpos( $_SERVER[‘SCRIPT_FILENAME’], $abspath_fix ) ) {
    // Request is hitting a file inside ABSPATH
    $directory = str_replace( ABSPATH, ”, $script_filename_dir );
    // Strip off the sub directory, and any file/query params
    $path = preg_replace( ‘#/’ . preg_quote( $directory, ‘#’ ) . ‘/[^/]*$#i’, ” , $_SERVER[‘REQUEST_URI’] );
    } elseif ( false !== strpos( $abspath_fix, $script_filename_dir ) ) {
    // Request is hitting a file above ABSPATH
    $subdirectory = substr( $abspath_fix, strpos( $abspath_fix, $script_filename_dir ) + strlen( $script_filename_dir ) );
    // Strip off any file/query params from the path, appending the sub directory to the installation
    $path = preg_replace( ‘#/[^/]*$#i’, ” , $_SERVER[‘REQUEST_URI’] ) . $subdirectory;
    } else {
    $path = $_SERVER[‘REQUEST_URI’];
    }
    }

    $schema = is_ssl() ? ‘https://&#8217; : ‘http://&#8217;; // set_url_scheme() is not defined yet
    $url = $schema . $_SERVER[‘HTTP_HOST’] . $path;
    }

    return rtrim($url, ‘/’);
    }

    /**
    * Temporarily suspend cache additions.
    *
    * Stops more data being added to the cache, but still allows cache retrieval.
    * This is useful for actions, such as imports, when a lot of data would otherwise
    * be almost uselessly added to the cache.
    *
    * Suspension lasts for a single page load at most. Remember to call this
    * function again if you wish to re-enable cache adds earlier.
    *
    * @since 3.3.0
    *
    * @staticvar bool $_suspend
    *
    * @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
    * @return bool The current suspend setting
    */
    function wp_suspend_cache_addition( $suspend = null ) {
    static $_suspend = false;

    if ( is_bool( $suspend ) )
    $_suspend = $suspend;

    return $_suspend;
    }

    /**
    * Suspend cache invalidation.
    *
    * Turns cache invalidation on and off. Useful during imports where you don’t want to do
    * invalidations every time a post is inserted. Callers must be sure that what they are
    * doing won’t lead to an inconsistent cache when invalidation is suspended.
    *
    * @since 2.7.0
    *
    * @global bool $_wp_suspend_cache_invalidation
    *
    * @param bool $suspend Optional. Whether to suspend or enable cache invalidation. Default true.
    * @return bool The current suspend setting.
    */
    function wp_suspend_cache_invalidation( $suspend = true ) {
    global $_wp_suspend_cache_invalidation;

    $current_suspend = $_wp_suspend_cache_invalidation;
    $_wp_suspend_cache_invalidation = $suspend;
    return $current_suspend;
    }

    /**
    * Determine whether a site is the main site of the current network.
    *
    * @since 3.0.0
    * @since 4.9.0 The $network_id parameter has been added.
    *
    * @param int $site_id Optional. Site ID to test. Defaults to current site.
    * @param int $network_id Optional. Network ID of the network to check for.
    * Defaults to current network.
    * @return bool True if $site_id is the main site of the network, or if not
    * running Multisite.
    */
    function is_main_site( $site_id = null, $network_id = null ) {
    if ( ! is_multisite() ) {
    return true;
    }

    if ( ! $site_id ) {
    $site_id = get_current_blog_id();
    }

    $site_id = (int) $site_id;

    return $site_id === get_main_site_id( $network_id );
    }

    /**
    * Gets the main site ID.
    *
    * @since 4.9.0
    *
    * @param int $network_id Optional. The ID of the network for which to get the main site.
    * Defaults to the current network.
    * @return int The ID of the main site.
    */
    function get_main_site_id( $network_id = null ) {
    if ( ! is_multisite() ) {
    return get_current_blog_id();
    }

    $network = get_network( $network_id );
    if ( ! $network ) {
    return 0;
    }

    return $network->site_id;
    }

    /**
    * Determine whether a network is the main network of the Multisite installation.
    *
    * @since 3.7.0
    *
    * @param int $network_id Optional. Network ID to test. Defaults to current network.
    * @return bool True if $network_id is the main network, or if not running Multisite.
    */
    function is_main_network( $network_id = null ) {
    if ( ! is_multisite() ) {
    return true;
    }

    if ( null === $network_id ) {
    $network_id = get_current_network_id();
    }

    $network_id = (int) $network_id;

    return ( $network_id === get_main_network_id() );
    }

    /**
    * Get the main network ID.
    *
    * @since 4.3.0
    *
    * @return int The ID of the main network.
    */
    function get_main_network_id() {
    if ( ! is_multisite() ) {
    return 1;
    }

    $current_network = get_network();

    if ( defined( ‘PRIMARY_NETWORK_ID’ ) ) {
    $main_network_id = PRIMARY_NETWORK_ID;
    } elseif ( isset( $current_network->id ) && 1 === (int) $current_network->id ) {
    // If the current network has an ID of 1, assume it is the main network.
    $main_network_id = 1;
    } else {
    $_networks = get_networks( array( ‘fields’ => ‘ids’, ‘number’ => 1 ) );
    $main_network_id = array_shift( $_networks );
    }

    /**
    * Filters the main network ID.
    *
    * @since 4.3.0
    *
    * @param int $main_network_id The ID of the main network.
    */
    return (int) apply_filters( ‘get_main_network_id’, $main_network_id );
    }

    /**
    * Determine whether global terms are enabled.
    *
    * @since 3.0.0
    *
    * @staticvar bool $global_terms
    *
    * @return bool True if multisite and global terms enabled.
    */
    function global_terms_enabled() {
    if ( ! is_multisite() )
    return false;

    static $global_terms = null;
    if ( is_null( $global_terms ) ) {

    /**
    * Filters whether global terms are enabled.
    *
    * Passing a non-null value to the filter will effectively short-circuit the function,
    * returning the value of the ‘global_terms_enabled’ site option instead.
    *
    * @since 3.0.0
    *
    * @param null $enabled Whether global terms are enabled.
    */
    $filter = apply_filters( ‘global_terms_enabled’, null );
    if ( ! is_null( $filter ) )
    $global_terms = (bool) $filter;
    else
    $global_terms = (bool) get_site_option( ‘global_terms_enabled’, false );
    }
    return $global_terms;
    }

    /**
    * gmt_offset modification for smart timezone handling.
    *
    * Overrides the gmt_offset option if we have a timezone_string available.
    *
    * @since 2.8.0
    *
    * @return float|false Timezone GMT offset, false otherwise.
    */
    function wp_timezone_override_offset() {
    if ( !$timezone_string = get_option( ‘timezone_string’ ) ) {
    return false;
    }

    $timezone_object = timezone_open( $timezone_string );
    $datetime_object = date_create();
    if ( false === $timezone_object || false === $datetime_object ) {
    return false;
    }
    return round( timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS, 2 );
    }

    /**
    * Sort-helper for timezones.
    *
    * @since 2.9.0
    * @access private
    *
    * @param array $a
    * @param array $b
    * @return int
    */
    function _wp_timezone_choice_usort_callback( $a, $b ) {
    // Don’t use translated versions of Etc
    if ( ‘Etc’ === $a[‘continent’] && ‘Etc’ === $b[‘continent’] ) {
    // Make the order of these more like the old dropdown
    if ( ‘GMT+’ === substr( $a[‘city’], 0, 4 ) && ‘GMT+’ === substr( $b[‘city’], 0, 4 ) ) {
    return -1 * ( strnatcasecmp( $a[‘city’], $b[‘city’] ) );
    }
    if ( ‘UTC’ === $a[‘city’] ) {
    if ( ‘GMT+’ === substr( $b[‘city’], 0, 4 ) ) {
    return 1;
    }
    return -1;
    }
    if ( ‘UTC’ === $b[‘city’] ) {
    if ( ‘GMT+’ === substr( $a[‘city’], 0, 4 ) ) {
    return -1;
    }
    return 1;
    }
    return strnatcasecmp( $a[‘city’], $b[‘city’] );
    }
    if ( $a[‘t_continent’] == $b[‘t_continent’] ) {
    if ( $a[‘t_city’] == $b[‘t_city’] ) {
    return strnatcasecmp( $a[‘t_subcity’], $b[‘t_subcity’] );
    }
    return strnatcasecmp( $a[‘t_city’], $b[‘t_city’] );
    } else {
    // Force Etc to the bottom of the list
    if ( ‘Etc’ === $a[‘continent’] ) {
    return 1;
    }
    if ( ‘Etc’ === $b[‘continent’] ) {
    return -1;
    }
    return strnatcasecmp( $a[‘t_continent’], $b[‘t_continent’] );
    }
    }

    /**
    * Gives a nicely-formatted list of timezone strings.
    *
    * @since 2.9.0
    * @since 4.7.0 Added the $locale parameter.
    *
    * @staticvar bool $mo_loaded
    * @staticvar string $locale_loaded
    *
    * @param string $selected_zone Selected timezone.
    * @param string $locale Optional. Locale to load the timezones in. Default current site locale.
    * @return string
    */
    function wp_timezone_choice( $selected_zone, $locale = null ) {
    static $mo_loaded = false, $locale_loaded = null;

    $continents = array( ‘Africa’, ‘America’, ‘Antarctica’, ‘Arctic’, ‘Asia’, ‘Atlantic’, ‘Australia’, ‘Europe’, ‘Indian’, ‘Pacific’);

    // Load translations for continents and cities.
    if ( ! $mo_loaded || $locale !== $locale_loaded ) {
    $locale_loaded = $locale ? $locale : get_locale();
    $mofile = WP_LANG_DIR . ‘/continents-cities-‘ . $locale_loaded . ‘.mo’;
    unload_textdomain( ‘continents-cities’ );
    load_textdomain( ‘continents-cities’, $mofile );
    $mo_loaded = true;
    }

    $zonen = array();
    foreach ( timezone_identifiers_list() as $zone ) {
    $zone = explode( ‘/’, $zone );
    if ( !in_array( $zone[0], $continents ) ) {
    continue;
    }

    // This determines what gets set and translated – we don’t translate Etc/* strings here, they are done later
    $exists = array(
    0 => ( isset( $zone[0] ) && $zone[0] ),
    1 => ( isset( $zone[1] ) && $zone[1] ),
    2 => ( isset( $zone[2] ) && $zone[2] ),
    );
    $exists[3] = ( $exists[0] && ‘Etc’ !== $zone[0] );
    $exists[4] = ( $exists[1] && $exists[3] );
    $exists[5] = ( $exists[2] && $exists[3] );

    $zonen[] = array(
    ‘continent’ => ( $exists[0] ? $zone[0] : ” ),
    ‘city’ => ( $exists[1] ? $zone[1] : ” ),
    ‘subcity’ => ( $exists[2] ? $zone[2] : ” ),
    ‘t_continent’ => ( $exists[3] ? translate( str_replace( ‘_’, ‘ ‘, $zone[0] ), ‘continents-cities’ ) : ” ),
    ‘t_city’ => ( $exists[4] ? translate( str_replace( ‘_’, ‘ ‘, $zone[1] ), ‘continents-cities’ ) : ” ),
    ‘t_subcity’ => ( $exists[5] ? translate( str_replace( ‘_’, ‘ ‘, $zone[2] ), ‘continents-cities’ ) : ” )
    );
    }
    usort( $zonen, ‘_wp_timezone_choice_usort_callback’ );

    $structure = array();

    if ( empty( $selected_zone ) ) {
    $structure[] = ‘<option selected=”selected” value=””>’ . __( ‘Select a city’ ) . ‘</option>’;
    }

    foreach ( $zonen as $key => $zone ) {
    // Build value in an array to join later
    $value = array( $zone[‘continent’] );

    if ( empty( $zone[‘city’] ) ) {
    // It’s at the continent level (generally won’t happen)
    $display = $zone[‘t_continent’];
    } else {
    // It’s inside a continent group

    // Continent optgroup
    if ( !isset( $zonen[$key – 1] ) || $zonen[$key – 1][‘continent’] !== $zone[‘continent’] ) {
    $label = $zone[‘t_continent’];
    $structure[] = ‘<optgroup label=”‘. esc_attr( $label ) .'”>’;
    }

    // Add the city to the value
    $value[] = $zone[‘city’];

    $display = $zone[‘t_city’];
    if ( !empty( $zone[‘subcity’] ) ) {
    // Add the subcity to the value
    $value[] = $zone[‘subcity’];
    $display .= ‘ – ‘ . $zone[‘t_subcity’];
    }
    }

    // Build the value
    $value = join( ‘/’, $value );
    $selected = ”;
    if ( $value === $selected_zone ) {
    $selected = ‘selected=”selected” ‘;
    }
    $structure[] = ‘<option ‘ . $selected . ‘value=”‘ . esc_attr( $value ) . ‘”>’ . esc_html( $display ) . “</option>”;

    // Close continent optgroup
    if ( !empty( $zone[‘city’] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1][‘continent’] !== $zone[‘continent’]) ) ) {
    $structure[] = ‘</optgroup>’;
    }
    }

    // Do UTC
    $structure[] = ‘<optgroup label=”‘. esc_attr__( ‘UTC’ ) .'”>’;
    $selected = ”;
    if ( ‘UTC’ === $selected_zone )
    $selected = ‘selected=”selected” ‘;
    $structure[] = ‘<option ‘ . $selected . ‘value=”‘ . esc_attr( ‘UTC’ ) . ‘”>’ . __(‘UTC’) . ‘</option>’;
    $structure[] = ‘</optgroup>’;

    // Do manual UTC offsets
    $structure[] = ‘<optgroup label=”‘. esc_attr__( ‘Manual Offsets’ ) .'”>’;
    $offset_range = array (-12, -11.5, -11, -10.5, -10, -9.5, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5,
    0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 5.75, 6, 6.5, 7, 7.5, 8, 8.5, 8.75, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.75, 13, 13.75, 14);
    foreach ( $offset_range as $offset ) {
    if ( 0 <= $offset )
    $offset_name = ‘+’ . $offset;
    else
    $offset_name = (string) $offset;

    $offset_value = $offset_name;
    $offset_name = str_replace(array(‘.25′,’.5′,’.75′), array(‘:15′,’:30′,’:45′), $offset_name);
    $offset_name = ‘UTC’ . $offset_name;
    $offset_value = ‘UTC’ . $offset_value;
    $selected = ”;
    if ( $offset_value === $selected_zone )
    $selected = ‘selected=”selected” ‘;
    $structure[] = ‘<option ‘ . $selected . ‘value=”‘ . esc_attr( $offset_value ) . ‘”>’ . esc_html( $offset_name ) . “</option>”;

    }
    $structure[] = ‘</optgroup>’;

    return join( “\n”, $structure );
    }

    /**
    * Strip close comment and close php tags from file headers used by WP.
    *
    * @since 2.8.0
    * @access private
    *
    * @see https://core.trac.wordpress.org/ticket/8497
    *
    * @param string $str Header comment to clean up.
    * @return string
    */
    function _cleanup_header_comment( $str ) {
    return trim(preg_replace(“/\s*(?:\*\/|\?>).*/”, ”, $str));
    }

    /**
    * Permanently delete comments or posts of any type that have held a status
    * of ‘trash’ for the number of days defined in EMPTY_TRASH_DAYS.
    *
    * The default value of EMPTY_TRASH_DAYS is 30 (days).
    *
    * @since 2.9.0
    *
    * @global wpdb $wpdb WordPress database abstraction object.
    */
    function wp_scheduled_delete() {
    global $wpdb;

    $delete_timestamp = time() – ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );

    $posts_to_delete = $wpdb->get_results($wpdb->prepare(“SELECT post_id FROM $wpdb->postmeta WHERE meta_key = ‘_wp_trash_meta_time’ AND meta_value < %d”, $delete_timestamp), ARRAY_A);

    foreach ( (array) $posts_to_delete as $post ) {
    $post_id = (int) $post[‘post_id’];
    if ( !$post_id )
    continue;

    $del_post = get_post($post_id);

    if ( !$del_post || ‘trash’ != $del_post->post_status ) {
    delete_post_meta($post_id, ‘_wp_trash_meta_status’);
    delete_post_meta($post_id, ‘_wp_trash_meta_time’);
    } else {
    wp_delete_post($post_id);
    }
    }

    $comments_to_delete = $wpdb->get_results($wpdb->prepare(“SELECT comment_id FROM $wpdb->commentmeta WHERE meta_key = ‘_wp_trash_meta_time’ AND meta_value < %d”, $delete_timestamp), ARRAY_A);

    foreach ( (array) $comments_to_delete as $comment ) {
    $comment_id = (int) $comment[‘comment_id’];
    if ( !$comment_id )
    continue;

    $del_comment = get_comment($comment_id);

    if ( !$del_comment || ‘trash’ != $del_comment->comment_approved ) {
    delete_comment_meta($comment_id, ‘_wp_trash_meta_time’);
    delete_comment_meta($comment_id, ‘_wp_trash_meta_status’);
    } else {
    wp_delete_comment( $del_comment );
    }
    }
    }

    /**
    * Retrieve metadata from a file.
    *
    * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
    * Each piece of metadata must be on its own line. Fields can not span multiple
    * lines, the value will get cut at the end of the first line.
    *
    * If the file data is not within that first 8kiB, then the author should correct
    * their plugin file and move the data headers to the top.
    *
    * @link https://codex.wordpress.org/File_Header
    *
    * @since 2.9.0
    *
    * @param string $file Path to the file.
    * @param array $default_headers List of headers, in the format array(‘HeaderKey’ => ‘Header Name’).
    * @param string $context Optional. If specified adds filter hook {@see ‘extra_$context_headers’}.
    * Default empty.
    * @return array Array of file headers in HeaderKey => Header Value format.
    */
    function get_file_data( $file, $default_headers, $context = ” ) {
    // We don’t need to write to the file, so just open for reading.
    $fp = fopen( $file, ‘r’ );

    // Pull only the first 8kiB of the file in.
    $file_data = fread( $fp, 8192 );

    // PHP will close file handle, but we are good citizens.
    fclose( $fp );

    // Make sure we catch CR-only line endings.
    $file_data = str_replace( “\r”, “\n”, $file_data );

    /**
    * Filters extra file headers by context.
    *
    * The dynamic portion of the hook name, $context, refers to
    * the context where extra headers might be loaded.
    *
    * @since 2.9.0
    *
    * @param array $extra_context_headers Empty array by default.
    */
    if ( $context && $extra_headers = apply_filters( “extra_{$context}_headers”, array() ) ) {
    $extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
    $all_headers = array_merge( $extra_headers, (array) $default_headers );
    } else {
    $all_headers = $default_headers;
    }

    foreach ( $all_headers as $field => $regex ) {
    if ( preg_match( ‘/^[ \t\/*#@]*’ . preg_quote( $regex, ‘/’ ) . ‘:(.*)$/mi’, $file_data, $match ) && $match[1] )
    $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
    else
    $all_headers[ $field ] = ”;
    }

    return $all_headers;
    }

    /**
    * Returns true.
    *
    * Useful for returning true to filters easily.
    *
    * @since 3.0.0
    *
    * @see __return_false()
    *
    * @return true True.
    */
    function __return_true() {
    return true;
    }

    /**
    * Returns false.
    *
    * Useful for returning false to filters easily.
    *
    * @since 3.0.0
    *
    * @see __return_true()
    *
    * @return false False.
    */
    function __return_false() {
    return false;
    }

    /**
    * Returns 0.
    *
    * Useful for returning 0 to filters easily.
    *
    * @since 3.0.0
    *
    * @return int 0.
    */
    function __return_zero() {
    return 0;
    }

    /**
    * Returns an empty array.
    *
    * Useful for returning an empty array to filters easily.
    *
    * @since 3.0.0
    *
    * @return array Empty array.
    */
    function __return_empty_array() {
    return array();
    }

    /**
    * Returns null.
    *
    * Useful for returning null to filters easily.
    *
    * @since 3.4.0
    *
    * @return null Null value.
    */
    function __return_null() {
    return null;
    }

    /**
    * Returns an empty string.
    *
    * Useful for returning an empty string to filters easily.
    *
    * @since 3.7.0
    *
    * @see __return_null()
    *
    * @return string Empty string.
    */
    function __return_empty_string() {
    return ”;
    }

    /**
    * Send a HTTP header to disable content type sniffing in browsers which support it.
    *
    * @since 3.0.0
    *
    * @see https://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
    * @see https://src.chromium.org/viewvc/chrome?view=rev&revision=6985
    */
    function send_nosniff_header() {
    @header( ‘X-Content-Type-Options: nosniff’ );
    }

    /**
    * Return a MySQL expression for selecting the week number based on the start_of_week option.
    *
    * @ignore
    * @since 3.0.0
    *
    * @param string $column Database column.
    * @return string SQL clause.
    */
    function _wp_mysql_week( $column ) {
    switch ( $start_of_week = (int) get_option( ‘start_of_week’ ) ) {
    case 1 :
    return “WEEK( $column, 1 )”;
    case 2 :
    case 3 :
    case 4 :
    case 5 :
    case 6 :
    return “WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )”;
    case 0 :
    default :
    return “WEEK( $column, 0 )”;
    }
    }

    /**
    * Find hierarchy loops using a callback function that maps object IDs to parent IDs.
    *
    * @since 3.1.0
    * @access private
    *
    * @param callable $callback Function that accepts ( ID, $callback_args ) and outputs parent_ID.
    * @param int $start The ID to start the loop check at.
    * @param int $start_parent The parent_ID of $start to use instead of calling $callback( $start ).
    * Use null to always use $callback
    * @param array $callback_args Optional. Additional arguments to send to $callback.
    * @return array IDs of all members of loop.
    */
    function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
    $override = is_null( $start_parent ) ? array() : array( $start => $start_parent );

    if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
    return array();

    return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
    }

    /**
    * Use the “The Tortoise and the Hare” algorithm to detect loops.
    *
    * For every step of the algorithm, the hare takes two steps and the tortoise one.
    * If the hare ever laps the tortoise, there must be a loop.
    *
    * @since 3.1.0
    * @access private
    *
    * @param callable $callback Function that accepts ( ID, callback_arg, … ) and outputs parent_ID.
    * @param int $start The ID to start the loop check at.
    * @param array $override Optional. An array of ( ID => parent_ID, … ) to use instead of $callback.
    * Default empty array.
    * @param array $callback_args Optional. Additional arguments to send to $callback. Default empty array.
    * @param bool $_return_loop Optional. Return loop members or just detect presence of loop? Only set
    * to true if you already know the given $start is part of a loop (otherwise
    * the returned array might include branches). Default false.
    * @return mixed Scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if
    * $_return_loop
    */
    function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
    $tortoise = $hare = $evanescent_hare = $start;
    $return = array();

    // Set evanescent_hare to one past hare
    // Increment hare two steps
    while (
    $tortoise
    &&
    ( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
    &&
    ( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
    ) {
    if ( $_return_loop )
    $return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;

    // tortoise got lapped – must be a loop
    if ( $tortoise == $evanescent_hare || $tortoise == $hare )
    return $_return_loop ? $return : $tortoise;

    // Increment tortoise by one step
    $tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
    }

    return false;
    }

    /**
    * Send a HTTP header to limit rendering of pages to same origin iframes.
    *
    * @since 3.1.3
    *
    * @see https://developer.mozilla.org/en/the_x-frame-options_response_header
    */
    function send_frame_options_header() {
    @header( ‘X-Frame-Options: SAMEORIGIN’ );
    }

    /**
    * Retrieve a list of protocols to allow in HTML attributes.
    *
    * @since 3.3.0
    * @since 4.3.0 Added ‘webcal’ to the protocols array.
    * @since 4.7.0 Added ‘urn’ to the protocols array.
    *
    * @see wp_kses()
    * @see esc_url()
    *
    * @staticvar array $protocols
    *
    * @return array Array of allowed protocols. Defaults to an array containing ‘http’, ‘https’,
    * ‘ftp’, ‘ftps’, ‘mailto’, ‘news’, ‘irc’, ‘gopher’, ‘nntp’, ‘feed’, ‘telnet’,
    * ‘mms’, ‘rtsp’, ‘svn’, ‘tel’, ‘fax’, ‘xmpp’, ‘webcal’, and ‘urn’.
    */
    function wp_allowed_protocols() {
    static $protocols = array();

    if ( empty( $protocols ) ) {
    $protocols = array( ‘http’, ‘https’, ‘ftp’, ‘ftps’, ‘mailto’, ‘news’, ‘irc’, ‘gopher’, ‘nntp’, ‘feed’, ‘telnet’, ‘mms’, ‘rtsp’, ‘svn’, ‘tel’, ‘fax’, ‘xmpp’, ‘webcal’, ‘urn’ );
    }

    if ( ! did_action( ‘wp_loaded’ ) ) {
    /**
    * Filters the list of protocols allowed in HTML attributes.
    *
    * @since 3.0.0
    *
    * @param array $protocols Array of allowed protocols e.g. ‘http’, ‘ftp’, ‘tel’, and more.
    */
    $protocols = array_unique( (array) apply_filters( ‘kses_allowed_protocols’, $protocols ) );
    }

    return $protocols;
    }

    /**
    * Return a comma-separated string of functions that have been called to get
    * to the current point in code.
    *
    * @since 3.4.0
    *
    * @see https://core.trac.wordpress.org/ticket/19589
    *
    * @param string $ignore_class Optional. A class to ignore all function calls within – useful
    * when you want to just give info about the callee. Default null.
    * @param int $skip_frames Optional. A number of stack frames to skip – useful for unwinding
    * back to the source of the issue. Default 0.
    * @param bool $pretty Optional. Whether or not you want a comma separated string or raw
    * array returned. Default true.
    * @return string|array Either a string containing a reversed comma separated trace or an array
    * of individual calls.
    */
    function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
    if ( version_compare( PHP_VERSION, ‘5.2.5’, ‘>=’ ) )
    $trace = debug_backtrace( false );
    else
    $trace = debug_backtrace();

    $caller = array();
    $check_class = ! is_null( $ignore_class );
    $skip_frames++; // skip this function

    foreach ( $trace as $call ) {
    if ( $skip_frames > 0 ) {
    $skip_frames–;
    } elseif ( isset( $call[‘class’] ) ) {
    if ( $check_class && $ignore_class == $call[‘class’] )
    continue; // Filter out calls

    $caller[] = “{$call[‘class’]}{$call[‘type’]}{$call[‘function’]}”;
    } else {
    if ( in_array( $call[‘function’], array( ‘do_action’, ‘apply_filters’ ) ) ) {
    $caller[] = “{$call[‘function’]}(‘{$call[‘args’][0]}’)”;
    } elseif ( in_array( $call[‘function’], array( ‘include’, ‘include_once’, ‘require’, ‘require_once’ ) ) ) {
    $caller[] = $call[‘function’] . “(‘” . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , ”, $call[‘args’][0] ) . “‘)”;
    } else {
    $caller[] = $call[‘function’];
    }
    }
    }
    if ( $pretty )
    return join( ‘, ‘, array_reverse( $caller ) );
    else
    return $caller;
    }

    /**
    * Retrieve ids that are not already present in the cache.
    *
    * @since 3.4.0
    * @access private
    *
    * @param array $object_ids ID list.
    * @param string $cache_key The cache bucket to check against.
    *
    * @return array List of ids not present in the cache.
    */
    function _get_non_cached_ids( $object_ids, $cache_key ) {
    $clean = array();
    foreach ( $object_ids as $id ) {
    $id = (int) $id;
    if ( !wp_cache_get( $id, $cache_key ) ) {
    $clean[] = $id;
    }
    }

    return $clean;
    }

    /**
    * Test if the current device has the capability to upload files.
    *
    * @since 3.4.0
    * @access private
    *
    * @return bool Whether the device is able to upload files.
    */
    function _device_can_upload() {
    if ( ! wp_is_mobile() )
    return true;

    $ua = $_SERVER[‘HTTP_USER_AGENT’];

    if ( strpos($ua, ‘iPhone’) !== false
    || strpos($ua, ‘iPad’) !== false
    || strpos($ua, ‘iPod’) !== false ) {
    return preg_match( ‘#OS ([\d_]+) like Mac OS X#’, $ua, $version ) && version_compare( $version[1], ‘6’, ‘>=’ );
    }

    return true;
    }

    /**
    * Test if a given path is a stream URL
    *
    * @since 3.5.0
    *
    * @param string $path The resource path or URL.
    * @return bool True if the path is a stream URL.
    */
    function wp_is_stream( $path ) {
    if ( false === strpos( $path, ‘://’ ) ) {
    // $path isn’t a stream
    return false;
    }

    $wrappers = stream_get_wrappers();
    $wrappers = array_map( ‘preg_quote’, $wrappers );
    $wrappers_re = ‘(‘ . join( ‘|’, $wrappers ) . ‘)’;

    return preg_match( “!^$wrappers_re://!”, $path ) === 1;
    }

    /**
    * Test if the supplied date is valid for the Gregorian calendar.
    *
    * @since 3.5.0
    *
    * @link https://secure.php.net/manual/en/function.checkdate.php
    *
    * @param int $month Month number.
    * @param int $day Day number.
    * @param int $year Year number.
    * @param string $source_date The date to filter.
    * @return bool True if valid date, false if not valid date.
    */
    function wp_checkdate( $month, $day, $year, $source_date ) {
    /**
    * Filters whether the given date is valid for the Gregorian calendar.
    *
    * @since 3.5.0
    *
    * @param bool $checkdate Whether the given date is valid.
    * @param string $source_date Date to check.
    */
    return apply_filters( ‘wp_checkdate’, checkdate( $month, $day, $year ), $source_date );
    }

    /**
    * Load the auth check for monitoring whether the user is still logged in.
    *
    * Can be disabled with remove_action( ‘admin_enqueue_scripts’, ‘wp_auth_check_load’ );
    *
    * This is disabled for certain screens where a login screen could cause an
    * inconvenient interruption. A filter called {@see ‘wp_auth_check_load’} can be used
    * for fine-grained control.
    *
    * @since 3.6.0
    */
    function wp_auth_check_load() {
    if ( ! is_admin() && ! is_user_logged_in() )
    return;

    if ( defined( ‘IFRAME_REQUEST’ ) )
    return;

    $screen = get_current_screen();
    $hidden = array( ‘update’, ‘update-network’, ‘update-core’, ‘update-core-network’, ‘upgrade’, ‘upgrade-network’, ‘network’ );
    $show = ! in_array( $screen->id, $hidden );

    /**
    * Filters whether to load the authentication check.
    *
    * Passing a falsey value to the filter will effectively short-circuit
    * loading the authentication check.
    *
    * @since 3.6.0
    *
    * @param bool $show Whether to load the authentication check.
    * @param WP_Screen $screen The current screen object.
    */
    if ( apply_filters( ‘wp_auth_check_load’, $show, $screen ) ) {
    wp_enqueue_style( ‘wp-auth-check’ );
    wp_enqueue_script( ‘wp-auth-check’ );

    add_action( ‘admin_print_footer_scripts’, ‘wp_auth_check_html’, 5 );
    add_action( ‘wp_print_footer_scripts’, ‘wp_auth_check_html’, 5 );
    }
    }

    /**
    * Output the HTML that shows the wp-login dialog when the user is no longer logged in.
    *
    * @since 3.6.0
    */
    function wp_auth_check_html() {
    $login_url = wp_login_url();
    $current_domain = ( is_ssl() ? ‘https://&#8217; : ‘http://&#8217; ) . $_SERVER[‘HTTP_HOST’];
    $same_domain = ( strpos( $login_url, $current_domain ) === 0 );

    /**
    * Filters whether the authentication check originated at the same domain.
    *
    * @since 3.6.0
    *
    * @param bool $same_domain Whether the authentication check originated at the same domain.
    */
    $same_domain = apply_filters( ‘wp_auth_check_same_domain’, $same_domain );
    $wrap_class = $same_domain ? ‘hidden’ : ‘hidden fallback’;

    ?>
    <div id=”wp-auth-check-wrap” class=”<?php echo $wrap_class; ?>”>
    <div id=”wp-auth-check-bg”></div>
    <div id=”wp-auth-check”>
    <button type=”button” class=”wp-auth-check-close button-link”><span class=”screen-reader-text”><?php _e( ‘Close dialog’ ); ?></span></button>
    <?php

    if ( $same_domain ) {
    $login_src = add_query_arg( array(
    ‘interim-login’ => ‘1’,
    ‘wp_lang’ => get_user_locale(),
    ), $login_url );
    ?>
    <div id=”wp-auth-check-form” class=”loading” data-src=”<?php echo esc_url( $login_src ); ?>”></div>
    <?php
    }

    ?>
    <div class=”wp-auth-fallback”>
    <p><b class=”wp-auth-fallback-expired” tabindex=”0″><?php _e(‘Session expired’); ?></b></p>
    <p><a href=”<?php echo esc_url( $login_url ); ?>” target=”_blank”><?php _e(‘Please log in again.’); ?></a>
    <?php _e(‘The login page will open in a new window. After logging in you can close it and return to this page.’); ?></p>
    </div>
    </div>
    </div>
    <?php
    }

    /**
    * Check whether a user is still logged in, for the heartbeat.
    *
    * Send a result that shows a log-in box if the user is no longer logged in,
    * or if their cookie is within the grace period.
    *
    * @since 3.6.0
    *
    * @global int $login_grace_period
    *
    * @param array $response The Heartbeat response.
    * @return array $response The Heartbeat response with ‘wp-auth-check’ value set.
    */
    function wp_auth_check( $response ) {
    $response[‘wp-auth-check’] = is_user_logged_in() && empty( $GLOBALS[‘login_grace_period’] );
    return $response;
    }

    /**
    * Return RegEx body to liberally match an opening HTML tag.
    *
    * Matches an opening HTML tag that:
    * 1. Is self-closing or
    * 2. Has no body but has a closing tag of the same name or
    * 3. Contains a body and a closing tag of the same name
    *
    * Note: this RegEx does not balance inner tags and does not attempt
    * to produce valid HTML
    *
    * @since 3.6.0
    *
    * @param string $tag An HTML tag name. Example: ‘video’.
    * @return string Tag RegEx.
    */
    function get_tag_regex( $tag ) {
    if ( empty( $tag ) )
    return;
    return sprintf( ‘<%1$s[^<]*(?:>[\s\S]*<\/%1$s>|\s*\/>)’, tag_escape( $tag ) );
    }

    /**
    * Retrieve a canonical form of the provided charset appropriate for passing to PHP
    * functions such as htmlspecialchars() and charset html attributes.
    *
    * @since 3.6.0
    * @access private
    *
    * @see https://core.trac.wordpress.org/ticket/23688
    *
    * @param string $charset A charset name.
    * @return string The canonical form of the charset.
    */
    function _canonical_charset( $charset ) {
    if ( ‘utf-8’ === strtolower( $charset ) || ‘utf8’ === strtolower( $charset) ) {

    return ‘UTF-8’;
    }

    if ( ‘iso-8859-1’ === strtolower( $charset ) || ‘iso8859-1’ === strtolower( $charset ) ) {

    return ‘ISO-8859-1’;
    }

    return $charset;
    }

    /**
    * Set the mbstring internal encoding to a binary safe encoding when func_overload
    * is enabled.
    *
    * When mbstring.func_overload is in use for multi-byte encodings, the results from
    * strlen() and similar functions respect the utf8 characters, causing binary data
    * to return incorrect lengths.
    *
    * This function overrides the mbstring encoding to a binary-safe encoding, and
    * resets it to the users expected encoding afterwards through the
    * reset_mbstring_encoding function.
    *
    * It is safe to recursively call this function, however each
    * mbstring_binary_safe_encoding() call must be followed up with an equal number
    * of reset_mbstring_encoding() calls.
    *
    * @since 3.7.0
    *
    * @see reset_mbstring_encoding()
    *
    * @staticvar array $encodings
    * @staticvar bool $overloaded
    *
    * @param bool $reset Optional. Whether to reset the encoding back to a previously-set encoding.
    * Default false.
    */
    function mbstring_binary_safe_encoding( $reset = false ) {
    static $encodings = array();
    static $overloaded = null;

    if ( is_null( $overloaded ) )
    $overloaded = function_exists( ‘mb_internal_encoding’ ) && ( ini_get( ‘mbstring.func_overload’ ) & 2 );

    if ( false === $overloaded )
    return;

    if ( ! $reset ) {
    $encoding = mb_internal_encoding();
    array_push( $encodings, $encoding );
    mb_internal_encoding( ‘ISO-8859-1’ );
    }

    if ( $reset && $encodings ) {
    $encoding = array_pop( $encodings );
    mb_internal_encoding( $encoding );
    }
    }

    /**
    * Reset the mbstring internal encoding to a users previously set encoding.
    *
    * @see mbstring_binary_safe_encoding()
    *
    * @since 3.7.0
    */
    function reset_mbstring_encoding() {
    mbstring_binary_safe_encoding( true );
    }

    /**
    * Filter/validate a variable as a boolean.
    *
    * Alternative to filter_var( $var, FILTER_VALIDATE_BOOLEAN ).
    *
    * @since 4.0.0
    *
    * @param mixed $var Boolean value to validate.
    * @return bool Whether the value is validated.
    */
    function wp_validate_boolean( $var ) {
    if ( is_bool( $var ) ) {
    return $var;
    }

    if ( is_string( $var ) && ‘false’ === strtolower( $var ) ) {
    return false;
    }

    return (bool) $var;
    }

    /**
    * Delete a file
    *
    * @since 4.2.0
    *
    * @param string $file The path to the file to delete.
    */
    function wp_delete_file( $file ) {
    /**
    * Filters the path of the file to delete.
    *
    * @since 2.1.0
    *
    * @param string $file Path to the file to delete.
    */
    $delete = apply_filters( ‘wp_delete_file’, $file );
    if ( ! empty( $delete ) ) {
    @unlink( $delete );
    }
    }

    /**
    * Deletes a file if its path is within the given directory.
    *
    * @since 4.9.7
    *
    * @param string $file Absolute path to the file to delete.
    * @param string $directory Absolute path to a directory.
    * @return bool True on success, false on failure.
    */
    function wp_delete_file_from_directory( $file, $directory ) {
    $real_file = realpath( wp_normalize_path( $file ) );
    $real_directory = realpath( wp_normalize_path( $directory ) );

    if ( false === $real_file || false === $real_directory || strpos( wp_normalize_path( $real_file ), trailingslashit( wp_normalize_path( $real_directory ) ) ) !== 0 ) {
    return false;
    }

    wp_delete_file( $file );

    return true;
    }

    /**
    * Outputs a small JS snippet on preview tabs/windows to remove window.name on unload.
    *
    * This prevents reusing the same tab for a preview when the user has navigated away.
    *
    * @since 4.3.0
    *
    * @global WP_Post $post
    */
    function wp_post_preview_js() {
    global $post;

    if ( ! is_preview() || empty( $post ) ) {
    return;
    }

    // Has to match the window name used in post_submit_meta_box()
    $name = ‘wp-preview-‘ . (int) $post->ID;

    ?>
    <script>
    ( function() {
    var query = document.location.search;

    if ( query && query.indexOf( ‘preview=true’ ) !== -1 ) {
    window.name = ‘<?php echo $name; ?>’;
    }

    if ( window.addEventListener ) {
    window.addEventListener( ‘unload’, function() { window.name = ”; }, false );
    }
    }());
    </script>
    <?php
    }

    /**
    * Parses and formats a MySQL datetime (Y-m-d H:i:s) for ISO8601/RFC3339.
    *
    * Explicitly strips timezones, as datetimes are not saved with any timezone
    * information. Including any information on the offset could be misleading.
    *
    * @since 4.4.0
    *
    * @param string $date_string Date string to parse and format.
    * @return string Date formatted for ISO8601/RFC3339.
    */
    function mysql_to_rfc3339( $date_string ) {
    $formatted = mysql2date( ‘c’, $date_string, false );

    // Strip timezone information
    return preg_replace( ‘/(?:Z|[+-]\d{2}(?::\d{2})?)$/’, ”, $formatted );
    }

    /**
    * Attempts to raise the PHP memory limit for memory intensive processes.
    *
    * Only allows raising the existing limit and prevents lowering it.
    *
    * @since 4.6.0
    *
    * @param string $context Optional. Context in which the function is called. Accepts either ‘admin’,
    * ‘image’, or an arbitrary other context. If an arbitrary context is passed,
    * the similarly arbitrary {@see ‘{$context}_memory_limit’} filter will be
    * invoked. Default ‘admin’.
    * @return bool|int|string The limit that was set or false on failure.
    */
    function wp_raise_memory_limit( $context = ‘admin’ ) {
    // Exit early if the limit cannot be changed.
    if ( false === wp_is_ini_value_changeable( ‘memory_limit’ ) ) {
    return false;
    }

    $current_limit = @ini_get( ‘memory_limit’ );
    $current_limit_int = wp_convert_hr_to_bytes( $current_limit );

    if ( -1 === $current_limit_int ) {
    return false;
    }

    $wp_max_limit = WP_MAX_MEMORY_LIMIT;
    $wp_max_limit_int = wp_convert_hr_to_bytes( $wp_max_limit );
    $filtered_limit = $wp_max_limit;

    switch ( $context ) {
    case ‘admin’:
    /**
    * Filters the maximum memory limit available for administration screens.
    *
    * This only applies to administrators, who may require more memory for tasks
    * like updates. Memory limits when processing images (uploaded or edited by
    * users of any role) are handled separately.
    *
    * The WP_MAX_MEMORY_LIMIT constant specifically defines the maximum memory
    * limit available when in the administration back end. The default is 256M
    * (256 megabytes of memory) or the original memory_limit php.ini value if
    * this is higher.
    *
    * @since 3.0.0
    * @since 4.6.0 The default now takes the original memory_limit into account.
    *
    * @param int|string $filtered_limit The maximum WordPress memory limit. Accepts an integer
    * (bytes), or a shorthand string notation, such as ‘256M’.
    */
    $filtered_limit = apply_filters( ‘admin_memory_limit’, $filtered_limit );
    break;

    case ‘image’:
    /**
    * Filters the memory limit allocated for image manipulation.
    *
    * @since 3.5.0
    * @since 4.6.0 The default now takes the original memory_limit into account.
    *
    * @param int|string $filtered_limit Maximum memory limit to allocate for images.
    * Default WP_MAX_MEMORY_LIMIT or the original
    * php.ini memory_limit, whichever is higher.
    * Accepts an integer (bytes), or a shorthand string
    * notation, such as ‘256M’.
    */
    $filtered_limit = apply_filters( ‘image_memory_limit’, $filtered_limit );
    break;

    default:
    /**
    * Filters the memory limit allocated for arbitrary contexts.
    *
    * The dynamic portion of the hook name, $context, refers to an arbitrary
    * context passed on calling the function. This allows for plugins to define
    * their own contexts for raising the memory limit.
    *
    * @since 4.6.0
    *
    * @param int|string $filtered_limit Maximum memory limit to allocate for images.
    * Default ‘256M’ or the original php.ini memory_limit,
    * whichever is higher. Accepts an integer (bytes), or a
    * shorthand string notation, such as ‘256M’.
    */
    $filtered_limit = apply_filters( “{$context}_memory_limit”, $filtered_limit );
    break;
    }

    $filtered_limit_int = wp_convert_hr_to_bytes( $filtered_limit );

    if ( -1 === $filtered_limit_int || ( $filtered_limit_int > $wp_max_limit_int && $filtered_limit_int > $current_limit_int ) ) {
    if ( false !== @ini_set( ‘memory_limit’, $filtered_limit ) ) {
    return $filtered_limit;
    } else {
    return false;
    }
    } elseif ( -1 === $wp_max_limit_int || $wp_max_limit_int > $current_limit_int ) {
    if ( false !== @ini_set( ‘memory_limit’, $wp_max_limit ) ) {
    return $wp_max_limit;
    } else {
    return false;
    }
    }

    return false;
    }

    /**
    * Generate a random UUID (version 4).
    *
    * @since 4.7.0
    *
    * @return string UUID.
    */
    function wp_generate_uuid4() {
    return sprintf( ‘%04x%04x-%04x-%04x-%04x-%04x%04x%04x’,
    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
    mt_rand( 0, 0xffff ),
    mt_rand( 0, 0x0fff ) | 0x4000,
    mt_rand( 0, 0x3fff ) | 0x8000,
    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
    );
    }

    /**
    * Validates that a UUID is valid.
    *
    * @since 4.9.0
    *
    * @param mixed $uuid UUID to check.
    * @param int $version Specify which version of UUID to check against. Default is none, to accept any UUID version. Otherwise, only version allowed is 4.
    * @return bool The string is a valid UUID or false on failure.
    */
    function wp_is_uuid( $uuid, $version = null ) {

    if ( ! is_string( $uuid ) ) {
    return false;
    }

    if ( is_numeric( $version ) ) {
    if ( 4 !== (int) $version ) {
    _doing_it_wrong( __FUNCTION__, __( ‘Only UUID V4 is supported at this time.’ ), ‘4.9.0’ );
    return false;
    }
    $regex = ‘/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/’;
    } else {
    $regex = ‘/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/’;
    }

    return (bool) preg_match( $regex, $uuid );
    }

    /**
    * Get unique ID.
    *
    * This is a PHP implementation of Underscore’s uniqueId method. A static variable
    * contains an integer that is incremented with each call. This number is returned
    * with the optional prefix. As such the returned value is not universally unique,
    * but it is unique across the life of the PHP process.
    *
    * @since 5.0.3
    *
    * @staticvar int $id_counter
    *
    * @param string $prefix Prefix for the returned ID.
    * @return string Unique ID.
    */
    function wp_unique_id( $prefix = ” ) {
    static $id_counter = 0;
    return $prefix . (string) ++$id_counter;
    }

    /**
    * Get last changed date for the specified cache group.
    *
    * @since 4.7.0
    *
    * @param string $group Where the cache contents are grouped.
    *
    * @return string $last_changed UNIX timestamp with microseconds representing when the group was last changed.
    */
    function wp_cache_get_last_changed( $group ) {
    $last_changed = wp_cache_get( ‘last_changed’, $group );

    if ( ! $last_changed ) {
    $last_changed = microtime();
    wp_cache_set( ‘last_changed’, $last_changed, $group );
    }

    return $last_changed;
    }

    /**
    * Send an email to the old site admin email address when the site admin email address changes.
    *
    * @since 4.9.0
    *
    * @param string $old_email The old site admin email address.
    * @param string $new_email The new site admin email address.
    * @param string $option_name The relevant database option name.
    */
    function wp_site_admin_email_change_notification( $old_email, $new_email, $option_name ) {
    $send = true;

    // Don’t send the notification to the default ‘admin_email’ value.
    if ( ‘you@example.com’ === $old_email ) {
    $send = false;
    }

    /**
    * Filters whether to send the site admin email change notification email.
    *
    * @since 4.9.0
    *
    * @param bool $send Whether to send the email notification.
    * @param string $old_email The old site admin email address.
    * @param string $new_email The new site admin email address.
    */
    $send = apply_filters( ‘send_site_admin_email_change_email’, $send, $old_email, $new_email );

    if ( ! $send ) {
    return;
    }

    /* translators: Do not translate OLD_EMAIL, NEW_EMAIL, SITENAME, SITEURL: those are placeholders. */
    $email_change_text = __( ‘Hi,

    This notice confirms that the admin email address was changed on ###SITENAME###.

    The new admin email address is ###NEW_EMAIL###.

    This email has been sent to ###OLD_EMAIL###

    Regards,
    All at ###SITENAME###
    ###SITEURL###’ );

    $email_change_email = array(
    ‘to’ => $old_email,
    /* translators: Site admin email change notification email subject. %s: Site title */
    ‘subject’ => __( ‘[%s] Notice of Admin Email Change’ ),
    ‘message’ => $email_change_text,
    ‘headers’ => ”,
    );
    // get site name
    $site_name = wp_specialchars_decode( get_option( ‘blogname’ ), ENT_QUOTES );

    /**
    * Filters the contents of the email notification sent when the site admin email address is changed.
    *
    * @since 4.9.0
    *
    * @param array $email_change_email {
    * Used to build wp_mail().
    *
    * @type string $to The intended recipient.
    * @type string $subject The subject of the email.
    * @type string $message The content of the email.
    * The following strings have a special meaning and will get replaced dynamically:
    * – ###OLD_EMAIL### The old site admin email address.
    * – ###NEW_EMAIL### The new site admin email address.
    * – ###SITENAME### The name of the site.
    * – ###SITEURL### The URL to the site.
    * @type string $headers Headers.
    * }
    * @param string $old_email The old site admin email address.
    * @param string $new_email The new site admin email address.
    */
    $email_change_email = apply_filters( ‘site_admin_email_change_email’, $email_change_email, $old_email, $new_email );

    $email_change_email[‘message’] = str_replace( ‘###OLD_EMAIL###’, $old_email, $email_change_email[‘message’] );
    $email_change_email[‘message’] = str_replace( ‘###NEW_EMAIL###’, $new_email, $email_change_email[‘message’] );
    $email_change_email[‘message’] = str_replace( ‘###SITENAME###’, $site_name, $email_change_email[‘message’] );
    $email_change_email[‘message’] = str_replace( ‘###SITEURL###’, home_url(), $email_change_email[‘message’] );

    wp_mail( $email_change_email[‘to’], sprintf(
    $email_change_email[‘subject’],
    $site_name
    ), $email_change_email[‘message’], $email_change_email[‘headers’] );
    }

    /**
    * Return an anonymized IPv4 or IPv6 address.
    *
    * @since 4.9.6 Abstracted from WP_Community_Events::get_unsafe_client_ip().
    *
    * @param string $ip_addr The IPv4 or IPv6 address to be anonymized.
    * @param bool $ipv6_fallback Optional. Whether to return the original IPv6 address if the needed functions
    * to anonymize it are not present. Default false, return :: (unspecified address).
    * @return string The anonymized IP address.
    */
    function wp_privacy_anonymize_ip( $ip_addr, $ipv6_fallback = false ) {
    // Detect what kind of IP address this is.
    $ip_prefix = ”;
    $is_ipv6 = substr_count( $ip_addr, ‘:’ ) > 1;
    $is_ipv4 = ( 3 === substr_count( $ip_addr, ‘.’ ) );

    if ( $is_ipv6 && $is_ipv4 ) {
    // IPv6 compatibility mode, temporarily strip the IPv6 part, and treat it like IPv4.
    $ip_prefix = ‘::ffff:’;
    $ip_addr = preg_replace( ‘/^\[?[0-9a-f:]*:/i’, ”, $ip_addr );
    $ip_addr = str_replace( ‘]’, ”, $ip_addr );
    $is_ipv6 = false;
    }

    if ( $is_ipv6 ) {
    // IPv6 addresses will always be enclosed in [] if there’s a port.
    $left_bracket = strpos( $ip_addr, ‘[‘ );
    $right_bracket = strpos( $ip_addr, ‘]’ );
    $percent = strpos( $ip_addr, ‘%’ );
    $netmask = ‘ffff:ffff:ffff:ffff:0000:0000:0000:0000’;

    // Strip the port (and [] from IPv6 addresses), if they exist.
    if ( false !== $left_bracket && false !== $right_bracket ) {
    $ip_addr = substr( $ip_addr, $left_bracket + 1, $right_bracket – $left_bracket – 1 );
    } elseif ( false !== $left_bracket || false !== $right_bracket ) {
    // The IP has one bracket, but not both, so it’s malformed.
    return ‘::’;
    }

    // Strip the reachability scope.
    if ( false !== $percent ) {
    $ip_addr = substr( $ip_addr, 0, $percent );
    }

    // No invalid characters should be left.
    if ( preg_match( ‘/[^0-9a-f:]/i’, $ip_addr ) ) {
    return ‘::’;
    }

    // Partially anonymize the IP by reducing it to the corresponding network ID.
    if ( function_exists( ‘inet_pton’ ) && function_exists( ‘inet_ntop’ ) ) {
    $ip_addr = inet_ntop( inet_pton( $ip_addr ) & inet_pton( $netmask ) );
    if ( false === $ip_addr) {
    return ‘::’;
    }
    } elseif ( ! $ipv6_fallback ) {
    return ‘::’;
    }
    } elseif ( $is_ipv4 ) {
    // Strip any port and partially anonymize the IP.
    $last_octet_position = strrpos( $ip_addr, ‘.’ );
    $ip_addr = substr( $ip_addr, 0, $last_octet_position ) . ‘.0’;
    } else {
    return ‘0.0.0.0’;
    }

    // Restore the IPv6 prefix to compatibility mode addresses.
    return $ip_prefix . $ip_addr;
    }

    /**
    * Return uniform “anonymous” data by type.
    *
    * @since 4.9.6
    *
    * @param string $type The type of data to be anonymized.
    * @param string $data Optional The data to be anonymized.
    * @return string The anonymous data for the requested type.
    */
    function wp_privacy_anonymize_data( $type, $data = ” ) {

    switch ( $type ) {
    case ’email’:
    $anonymous = ‘deleted@site.invalid’;
    break;
    case ‘url’:
    $anonymous = ‘https://site.invalid&#8217;;
    break;
    case ‘ip’:
    $anonymous = wp_privacy_anonymize_ip( $data );
    break;
    case ‘date’:
    $anonymous = ‘0000-00-00 00:00:00’;
    break;
    case ‘text’:
    /* translators: deleted text */
    $anonymous = __( ‘[deleted]’ );
    break;
    case ‘longtext’:
    /* translators: deleted long text */
    $anonymous = __( ‘This content was deleted by the author.’ );
    break;
    default:
    $anonymous = ”;
    }

    /**
    * Filters the anonymous data for each type.
    *
    * @since 4.9.6
    *
    * @param string $anonymous Anonymized data.
    * @param string $type Type of the data.
    * @param string $data Original data.
    */
    return apply_filters( ‘wp_privacy_anonymize_data’, $anonymous, $type, $data );
    }

    /**
    * Returns the directory used to store personal data export files.
    *
    * @since 4.9.6
    *
    * @see wp_privacy_exports_url
    *
    * @return string Exports directory.
    */
    function wp_privacy_exports_dir() {
    $upload_dir = wp_upload_dir();
    $exports_dir = trailingslashit( $upload_dir[‘basedir’] ) . ‘wp-personal-data-exports/’;

    /**
    * Filters the directory used to store personal data export files.
    *
    * @since 4.9.6
    *
    * @param string $exports_dir Exports directory.
    */
    return apply_filters( ‘wp_privacy_exports_dir’, $exports_dir );
    }

    /**
    * Returns the URL of the directory used to store personal data export files.
    *
    * @since 4.9.6
    *
    * @see wp_privacy_exports_dir
    *
    * @return string Exports directory URL.
    */
    function wp_privacy_exports_url() {
    $upload_dir = wp_upload_dir();
    $exports_url = trailingslashit( $upload_dir[‘baseurl’] ) . ‘wp-personal-data-exports/’;

    /**
    * Filters the URL of the directory used to store personal data export files.
    *
    * @since 4.9.6
    *
    * @param string $exports_url Exports directory URL.
    */
    return apply_filters( ‘wp_privacy_exports_url’, $exports_url );
    }

    /**
    * Schedule a WP_Cron job to delete expired export files.
    *
    * @since 4.9.6
    */
    function wp_schedule_delete_old_privacy_export_files() {
    if ( wp_installing() ) {
    return;
    }

    if ( ! wp_next_scheduled( ‘wp_privacy_delete_old_export_files’ ) ) {
    wp_schedule_event( time(), ‘hourly’, ‘wp_privacy_delete_old_export_files’ );
    }
    }

    /**
    * Cleans up export files older than three days old.
    *
    * The export files are stored in wp-content/uploads, and are therefore publicly
    * accessible. A CSPRN is appended to the filename to mitigate the risk of an
    * unauthorized person downloading the file, but it is still possible. Deleting
    * the file after the data subject has had a chance to delete it adds an additional
    * layer of protection.
    *
    * @since 4.9.6
    */
    function wp_privacy_delete_old_export_files() {
    require_once( ABSPATH . ‘wp-admin/includes/file.php’ );

    $exports_dir = wp_privacy_exports_dir();
    $export_files = list_files( $exports_dir, 100, array( ‘index.html’ ) );

    /**
    * Filters the lifetime, in seconds, of a personal data export file.
    *
    * By default, the lifetime is 3 days. Once the file reaches that age, it will automatically
    * be deleted by a cron job.
    *
    * @since 4.9.6
    *
    * @param int $expiration The expiration age of the export, in seconds.
    */
    $expiration = apply_filters( ‘wp_privacy_export_expiration’, 3 * DAY_IN_SECONDS );

    foreach ( (array) $export_files as $export_file ) {
    $file_age_in_seconds = time() – filemtime( $export_file );

    if ( $expiration < $file_age_in_seconds ) {
    unlink( $export_file );
    }
    }
    }

    this is my functions.php

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