Title: thumb.php does not pull the picture Last modified: August 19, 2016 --- # thumb.php does not pull the picture * [do77](https://wordpress.org/support/users/do77/) * (@do77) * [16 years, 10 months ago](https://wordpress.org/support/topic/thumbphp-does-not-pull-the-picture/) * Hey, I have been trying to show the pictues I upload also as a thumbnail. The following php file is supposed to pull the picture and resizes it: * ``` if( !isset( $_REQUEST[ "src" ] ) ) { die( "no image specified" ); } // clean params before use $src = $_REQUEST['src']; // possibles? //$src = preg_replace( "/^(\.+(\/|))+/", "", $src ); //$src = str_replace( "../", "", $src ); //$src = preg_replace( '/^(s?f|ht)tps?:\/\/[^\/]+/i', '', $src ); $src = preg_replace( "/(?:^\/+|\.{2,}\/+?)/", "", $src ); $src = preg_replace( '/^\w+:\/\/[^\/]+/', '', $src ); $new_width = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'w' ] ); $new_height = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'h' ] ); $zoom_crop = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'zc' ] ); if( !isset( $_REQUEST['q'] ) ) { $quality = 80; } else { $quality = preg_replace("/[^0-9]/", "", $_REQUEST['q'] ); } // set path to cache directory (default is ./cache) // this can be changed to a different location $cache_dir = './cache'; // get mime type of src $mime_type = mime_type( $src ); // check to see if this image is in the cache already check_cache( $cache_dir, $mime_type ); // make sure that the src is gif/jpg/png if( !valid_src_mime_type( $mime_type ) ) { $error = "Invalid src mime type: $mime_type"; die( $error ); } // check to see if GD function exist if(!function_exists('imagecreatetruecolor')) { $error = "GD Library Error: imagecreatetruecolor does not exist"; die( $error ); } // set document root $doc_root = $_SERVER['DOCUMENT_ROOT']; // get path to image on file system $src = $doc_root . '/' . $src; if(strlen($src) && file_exists( $src ) ) { // open the existing image $image = open_image($mime_type, $src); if ($image === false) { die ('Unable to open image : ' . $src ); } // Get original width and height $width = imagesx($image); $height = imagesy($image); // generate new w/h if not provided if($new_width && !$new_height) { $new_height = $height * ($new_width/$width); } elseif($new_height && !$new_width) { $new_width = $width * ($new_height/$height); } elseif(!$new_width && !$new_height) { $new_width = $width; $new_height = $height; } // create a new true color image $canvas = imagecreatetruecolor($new_width, $new_height); if( $zoom_crop ) { $src_x = $src_y = 0; $src_w = $width; $src_h = $height; $cmp_x = $width / $new_width; $cmp_y = $height / $new_height; // calculate x or y coordinate and width or height of source if ( $cmp_x > $cmp_y ) { $src_w = round( ( $width / $cmp_x * $cmp_y ) ); $src_x = round( ( $width - ( $width / $cmp_x * $cmp_y ) ) / 2 ); } elseif ( $cmp_y > $cmp_x ) { $src_h = round( ( $height / $cmp_y * $cmp_x ) ); $src_y = round( ( $height - ( $height / $cmp_y * $cmp_x ) ) / 2 ); } imagecopyresampled( $canvas, $image, 0, 0, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h ); } else { // copy and resize part of an image with resampling imagecopyresampled( $canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height ); } // output image to browser based on mime type show_image( $mime_type, $canvas, $quality, $cache_dir ); // remove image from memory ImageDestroy( $canvas ); } else { if( strlen( $src ) ) { echo $src . ' not found.'; } else { echo 'no source specified.'; } } function show_image ($mime_type, $image_resized, $quality, $cache_dir) { // check to see if we can write to the cache directory $is_writable = 0; $cache_file_name = $cache_dir . '/' . get_cache_file(); if( touch( $cache_file_name ) ) { // give 666 permissions so that the developer // can overwrite web server user chmod( $cache_file_name, 0666 ); $is_writable = 1; } else { $cache_file_name = NULL; header('Content-type: ' . $mime_type); } if(stristr( $mime_type, 'gif' ) ) { imagegif( $image_resized, $cache_file_name ); } elseif( stristr( $mime_type, 'jpeg' ) ) { imagejpeg( $image_resized, $cache_file_name, $quality ); } elseif( stristr( $mime_type, 'png' ) ) { imagepng( $image_resized, $cache_file_name, ceil( $quality / 10 ) ); } if( $is_writable ) { show_cache_file( $cache_dir, $mime_type ); } exit; } function open_image ($mime_type, $src) { if(stristr($mime_type, 'gif')) { $image = imagecreatefromgif($src); } elseif(stristr($mime_type, 'jpeg')) { $image = imagecreatefromjpeg($src); } elseif(stristr($mime_type, 'png')) { $image = imagecreatefrompng($src); } return $image; } function mime_type( $file ) { $frags = split( "\.", $file ); $ext = strtolower( $frags[ count( $frags ) - 1 ] ); $types = array( 'jpg' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'png' => 'image/png', 'gif' => 'image/gif', 'bmp' => 'image/bmp', 'doc' => 'application/msword', 'xls' => 'application/msword', 'xml' => 'text/xml', 'html' => 'text/html' ); $mime_type = $types[ $ext ]; if( !strlen( $mime_type ) ) { $mime_type = 'unknown'; } return $mime_type; } function valid_src_mime_type ( $mime_type ) { if( preg_match( "/jpg|jpeg|gif|png/i", $mime_type ) ) { return 1; } return 0; } function check_cache ( $cache_dir, $mime_type ) { // make sure cache dir exists if( !file_exists( $cache_dir ) ) { // give 777 permissions so that developer can overwrite // files created by web server user mkdir( $cache_dir ); chmod( $cache_dir, 0777 ); } show_cache_file( $cache_dir, $mime_type ); } function show_cache_file ( $cache_dir, $mime_type ) { $cache_file = get_cache_file(); if( file_exists( $cache_dir . '/' . $cache_file ) ) { // check for updates $if_modified_since = preg_replace( '/;.*$/', '', $_SERVER[ "HTTP_IF_MODIFIED_SINCE" ] ); $gmdate_mod = gmdate( 'D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) ); if( strstr( $gmdate_mod, 'GMT' ) ) { $gmdate_mod .= " GMT"; } //error_log("TimThumb: $gmdate_mod == $if_modified_since"); if ( $if_modified_since == $gmdate_mod ) { header( "HTTP/1.1 304 Not Modified" ); exit; } // send headers then display image header( "Content-Type: " . $mime_type ); header( "Last-Modified: " . gmdate( 'D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) . " GMT" ) ); header( "Content-Length: " . filesize( $cache_dir . '/' . $cache_file ) ); header( "Cache-Control: max-age=9999, must-revalidate" ); header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + 9999 ) . "GMT" ); readfile( $cache_dir . '/' . $cache_file ); exit; } } function get_cache_file () { $request_params = $_REQUEST; $cachename = $_REQUEST['src'] . $_REQUEST['w'] . $_REQUEST['h'] . $_REQUEST['zc'] . $_REQUEST['q']; $cache_file = md5( $cachename ); return $cache_file; } ?> ``` * In the writing panel I have a custom field that says ‘Enter the URL of the picture that you want to auto-resize’. When I enter the URL it automatically creates a custom field with the name ‘image’. So basically everything should work. * But the thumbnail does not show up. Instead it shows a question mark on the homepage next to the article. I have been trying it since hours but I can’t figure out what’s wrong!! Any ideas? * do77 The topic ‘thumb.php does not pull the picture’ is closed to new replies. * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 0 replies * 1 participant * Last reply from: [do77](https://wordpress.org/support/users/do77/) * Last activity: [16 years, 10 months ago](https://wordpress.org/support/topic/thumbphp-does-not-pull-the-picture/) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics