plugin_name = $plugin_name; $this->version = $version; } public function enqueue_styles() { wp_enqueue_style( $this->plugin_name, plugin_dir_url(__FILE__) . 'css/gallery-admin.css', array(), $this->version, 'all' ); // Add Dashicons for feature icons wp_enqueue_style('dashicons'); } public function enqueue_scripts() { wp_enqueue_media(); // Enqueue jQuery UI for sortable functionality wp_enqueue_script('jquery-ui-core'); wp_enqueue_script('jquery-ui-sortable'); wp_enqueue_script( $this->plugin_name, plugin_dir_url(__FILE__) . 'js/gallery-admin.js', array('jquery', 'jquery-ui-sortable'), $this->version, false ); } public function add_admin_menu() { add_management_page( 'Advanced Gallery Fields Settings', 'Advanced Gallery Fields', 'manage_options', 'advanced-gallery-fields', array($this, 'display_settings_page') ); } public function register_settings() { register_setting( 'advanced_gallery_settings', 'advanced_gallery_post_types', array( 'type' => 'array', 'sanitize_callback' => array($this, 'sanitize_post_types'), ) ); } /** * Sanitize the post types array * * @param array $input Array of post types to sanitize * @return array Sanitized array of post types */ public function sanitize_post_types($input) { if (!is_array($input)) { return array('post'); } return array_map('sanitize_key', $input); } public function display_settings_page() { $post_types = get_post_types(['public' => true], 'objects'); $saved_post_types = get_option('advanced_gallery_post_types', ['post']); ?>

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Select which post types should have the custom gallery field available. The gallery field will appear in the editor for the selected post types.

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ID, '_advanced_gallery', true); $gallery_ids = $this->sanitize_gallery_ids($gallery_ids); ?>
is_valid_attachment($image_id)) { continue; } $image_html = wp_get_attachment_image($image_id, 'thumbnail'); if ($image_html) { echo '
'; echo wp_kses_post($image_html); echo '
'; echo ''; echo '
'; } } } ?>
sanitize_gallery_ids(sanitize_text_field(wp_unslash($_POST['gallery_data']))); if ($gallery_data !== false) { update_post_meta($post_id, '_advanced_gallery', $gallery_data); } } } /** * Sanitize and validate gallery IDs * * @param string $gallery_ids Comma-separated list of gallery image IDs * @return string|false Sanitized comma-separated list of gallery image IDs, or false on error */ private function sanitize_gallery_ids($gallery_ids) { if (empty($gallery_ids)) { return ''; } // Basic input validation if (!is_string($gallery_ids)) { return false; } // Convert to array and ensure all values are numeric $ids_array = array_filter( explode(',', $gallery_ids), function($value) { return is_numeric(trim($value)); } ); if (empty($ids_array)) { return false; } // Convert all IDs to positive integers and remove duplicates $ids_array = array_unique(array_map('absint', $ids_array)); // Filter out any invalid attachment IDs $valid_ids = array_filter($ids_array, array($this, 'is_valid_attachment')); if (empty($valid_ids)) { return false; } return implode(',', $valid_ids); } /** * Validate if an ID represents a valid attachment * * @param int $attachment_id The attachment ID to validate * @return bool Whether the attachment ID is valid */ private function is_valid_attachment($attachment_id) { $attachment = get_post($attachment_id); return !empty($attachment) && $attachment->post_type === 'attachment'; } }