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headers already stated and 1 character of unexpected output (1 post)

  1. vk011
    Member
    Posted 6 months ago #

    I am making a simple plugin that will filter search via categories and it works but after I activate the plugin I get "1 characters of unexpected output sent" and also "headers already sent" error on post updates etc.

    What do I need to change in my code so that doesn't appear?

    $search_text = '';
    $default_cat = 'all'; // default option in category dropdown
    $excluded_cats = array(); // raw
    $clean_excluded_cats = array();
    $cat_text = '';
    
    add_option('vkssfl_search_text', $search_text);
    add_option('vkssfl_default_cat', $default_cat);
    add_option('vkssfl_excluded_cats', $excluded_cats);
    add_option('vkssfl_clean_excluded_cats', $clean_excluded_cats);
    add_option('vkssfl_cat_text', $cat_text);
    add_option('vkssfl_cat_style', $cat_style);
    
    // add options page
    
    function vkssfl_add_config_page() {
        add_options_page(
            'Super Search Filter Lite Options',
            'Super Search Filter Lite',
            'manage_options',
            basename(__FILE__),
            'vkssfl_config_page'
        );
    }
    add_action('admin_menu', 'vkssfl_add_config_page');
    
    // make the config options
    function vkssfl_config_page() {
    
        // if options are submitted (from admin)
        if (isset($_POST['submit'])) {
    
            // some security checks
            $nonce = $_REQUEST['_wpnonce'];
            if (! wp_verify_nonce($nonce, 'vkssflfp-updatesettings' ) ) {
                die('security error');
            }
            if (! current_user_can('manage_options') ) {
                    die('you can\'t manage options');
            }
            check_admin_referer('vkssflfp-updatesettings');
    
            // get new option values
            $search_text = $_POST['search-text'];
            $meta_search_key = $_POST['meta_search_key'];
            $default_cat = $_POST['default-cat'];
            $excluded_cats = $_POST['post_category'];
    
            // fix return values
            $fix = (array)$_POST['post_category'];
            array_unshift($fix, '1');
            $clean_excluded_cats = implode(',' , $fix);
    
            $cat_text = $_POST['cat-text'];
    
            if ($_POST['cat_style'] == 'checkbox') {
                $cat_style = 'checkbox';
            } elseif ($_POST['cat_style'] == 'dropdown') {
                $cat_style = 'dropdown';
            } else if ($_POST['cat_style'] == 'none') {
                $cat_style = 'none';
            } else {
                $cat_style = 'none';
            }
    
            // update options in the db
            update_option('vkssfl_search_text', $search_text);
            update_option('vkssfl_default_cat', $default_cat);
            update_option('vkssfl_excluded_cats', $excluded_cats);
            update_option('vkssfl_clean_excluded_cats', $clean_excluded_cats);
            update_option('vkssfl_cat_text', $cat_text);
            update_option('vkssfl_cat_style', $cat_style);  
    
        } // end if options are submitted (from admin)
    
        // get options from the db
        $search_text = get_option('vkssfl_search_text');
        $default_cat = get_option('vkssfl_default_cat');
        $excluded_cats = get_option('vkssfl_excluded_cats');
        $clean_excluded_cats = get_option('vkssfl_clean_excluded_cats');
        $cat_text = get_option('vkssfl_cat_text');
        $cat_style = get_option('vkssfl_cat_style');
    
        ?>
    
        <div class="wrap">
            <h2>Super Search Filter LITE options</h2>
    
            <form action="" method="post" id="sbc-config">
    
                <table class="form-table">
    <?php wp_nonce_field('vkssflfp-updatesettings'); ?>
                <tr>
                    <th scope="row" valign="top">
                    <label for="search-text">
                        Display text inside the search box:
                    </label>
                    </th>
                    <td>
                        <input type="text" name="search-text" id="search-text" class="regular-text" value="<?php echo $search_text; ?>">
                    </td>
                </tr>
    
                <tr>
                    <th scope="row" valign="top">
                    <label for="search-text">
                        Display categories as:
                    </label>
                    </th>
                    <td>
    <?php $gcs = get_option('vkssfl_cat_style'); ?>
                        <input type="radio" name="cat_style" id="cb" value="checkbox" <?php if ($gcs == 'checkbox') echo 'checked="checked"'; ?>>
                        <label for="cb">Checkbox</label>
                        <input type="radio" name="cat_style" id="dd" value="dropdown" <?php if ($gcs == 'dropdown') echo 'checked="checked"'; ?>>
                        <label for="dd">Dropdown</label>
                        <input type="radio" name="cat_style" id="none" value="none" <?php if ($gcs != 'dropdown' && $gcs != 'checkbox') echo 'checked="checked"'; ?>>
                        <label for="none">None</label>
                    </td>
                </tr>
    
                <tr>
                    <th scope="row" valign="top">
                    <label for="search-text">
                        Search categories text:
                    </label>
                    </th>
                    <td>
                        <input type="text" name="cat-text" id="search-text" class="regular-text" value="<?php echo $cat_text; ?>">
                    </td>
                </tr>
    
                <tr>
                    <th scope="row" valign="top">
                    <label for="default-cat">
                        Display text to choose all categories:
                    </label>
                    </th>
                    <td>
                        <input type="text" name="default-cat" id="default-cat" class="regular-text" value="<?php echo $default_cat; ?>">
                    </td>
                </tr>
    
                <tr>
                    <th>
                    <label for="focus">Categories to exclude:</label>
                    </th>
                    <td><ul><?php wp_category_checklist(0,0,$excluded_cats); ?></ul></td>
                </tr>
    
                </table>
    
                <p class="submit"><input type="submit" value="Save Changes" class="button button-primary" id="submit" name="submit"></p>
    
                </form>
            </div>
    <?php
    } // end vkssfl_config_page()
    
    function vkssfl_form() {
    
        // get options from the db
        $search_text = get_option('vkssfl_search_text');
        $default_cat = get_option('vkssfl_default_cat');
        $excluded_cats = get_option('vkssfl_excluded_cats');
        $clean_excluded_cats = get_option('vkssfl_clean_excluded_cats');
    
        $settings = array(
        'show_option_all'    => $default_cat,
        'show_option_none'   => '',
        'orderby'            => 'id',
        'order'              => 'ASC',
        'show_count'         => 0,
        'hide_empty'         => 0,
        'child_of'           => 0,
        'exclude'            => "'".$clean_excluded_cats."'",
        'echo'               => 0,
        'selected'           => 0,
        'hierarchical'       => 0,
        'name'               => 'cat',
        'id'                 => '',
        'class'              => 'postform',
        'depth'              => 0,
        'tab_index'          => 0,
        'taxonomy'           => 'category',
        'hide_if_empty'      => false,
        'walker'             => ''
        ); 
    
        $list = wp_dropdown_categories($settings);
    
        $blog_url = get_bloginfo('url');
    
        ?>
        <div id="vkssfl">
        <form method="get" action="<?php echo $blog_url; ?>" id="vkssfl-search" name="vkssflfp-config">
            <input type="text" value="<?php echo $search_text; ?>" name="s" id="s" />
    <?php $cat_title = get_option('vkssfl_cat_text'); ?>
    <?php echo '<div>'; ?>
    <?php if (!empty($cat_title)) echo "<h4>$cat_title</h4>"; ?>
    <?php
            // make checkboxes from categories
            $args = array(
                    'exclude' => $excluded_cats,
                    'orderby' => 'id',
                    'order' => 'ASC'
                );
            $t = get_categories($args);
            // print_r($t);
            $cat_style = get_option('vkssfl_cat_style');;
            if ($cat_style == 'checkbox') {
                foreach ($t as $v) {
                echo "<p><input type=\"checkbox\" name=\"get_cb[]\" value=\"$v->cat_ID\" id=\"$v->name\" /><label for=\"$v->name\"> $v->name</label></p>";
                }
            } elseif ($cat_style == 'dropdown') {
            echo $list;
            }
            echo '</div>';
            ?>
            <p class="ssbtn"><button>Submit</button></p>
        </form>
        </div>
    <?php
    
    } // end vkssfl_form()
    
    function vkssfl_super_search($query) {
    
        // has the form been init?
        if (isset($_GET['s'])) {
    
            // get excluded cats
            $excluded_cats = get_option('vkssfl_excluded_cats');
    
            //make the query
            $s = filter_input(INPUT_GET, 's', FILTER_SANITIZE_STRING);
            // if ( empty( $s ) ) return;
            $query->is_search = true;
            $query->set( 's', $s );
            $query->set( 'category__not_in', $excluded_cats );
    
            // get which category chekboxes were checked
            if (isset($_GET['get_cb'])) {
                $get_cb = $_GET['get_cb'];
                foreach ($get_cb as $value) {
                    $cbid .= ','.$value;
                }
                $cbid = ltrim($cbid, ',');
                $new_cbid = explode(',', $cbid);
            }
            if (isset($_GET['get_cb'])) {
                $query->set( 'category__in', $new_cbid );
            }
    
        } // end has the form been init?
    
    } // end vkssfl_super_search()
    add_action('pre_get_posts', 'vkssfl_super_search');
    
    // add display hooks
    add_shortcode('vkssfl', 'vkssfl_form');
    add_filter('widget_text', 'do_shortcode');

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