name : page-template.class.php <?php /** * @author ThemePunch <info@themepunch.com> * @link https://www.themepunch.com/ * @copyright 2022 ThemePunch */ if( !defined( 'ABSPATH') ) exit(); class RevSliderPageTemplate { /** * A reference to an instance of this class. */ private static $instance; /** * The array of templates that this plugin tracks. */ protected $templates; /** * Returns an instance of this class. */ public static function get_instance() { if( null == self::$instance ) { self::$instance = new RevSliderPageTemplate(); } return self::$instance; } /** * Initializes the plugin by setting filters and administration functions. */ private function __construct() { $this->templates = array(); // Add a filter to the attributes metabox to inject template into the cache. add_filter( 'page_attributes_dropdown_pages_args', array( $this, 'register_project_templates' ) ); // Add a filter to the save post to inject out template into the page cache add_filter( 'wp_insert_post_data', array( $this, 'register_project_templates' ) ); // Add a filter to the template include to determine if the page has our // template assigned and return it's path add_filter( 'template_include', array( $this, 'view_project_template') ); // Add your templates to this array. $this->templates = array( '../public/views/revslider-page-template.php' => 'Slider Revolution Blank Template', ); // Fix for WP 4.7 add_filter( 'theme_page_templates', array($this, 'register_project_templates_new' ) ); // Add filters to the attributes metabox to inject templates to all posts $types = get_post_types( [], 'objects' ); foreach ( $types as $type => $values ) { if ( isset( $type ) ) { $type_name = 'theme_' . $type . '_templates'; add_filter( $type_name , array( $this, 'add_post_templates' )); } } } // Adds our template to the new post templates setting (WP >= 4.7) public function register_project_templates_new( $post_templates ) { $post_templates = array_merge( $post_templates, $this->templates ); return $post_templates; } public function add_post_templates( $templates ) { $my_virtual_templates = array( '../public/views/revslider-page-template.php' => 'Slider Revolution Blank Template', ); // Merge with any templates already available $templates = array_merge( $templates, $my_virtual_templates ); return $templates; } /** * Adds our template to the pages cache in order to trick WordPress * into thinking the template file exists where it doens't really exist. * */ public function register_project_templates( $atts ) { // Create the key used for the themes cache $cache_key = 'page_templates-' . md5( get_theme_root() . '/' . get_stylesheet() ); // Retrieve the cache list. // If it doesn't exist, or it's empty prepare an array $templates = wp_get_theme()->get_page_templates(); if ( empty( $templates ) ) { $templates = array(); } // New cache, therefore remove the old one wp_cache_delete( $cache_key , 'themes'); // Now add our template to the list of templates by merging our templates // with the existing templates array from the cache. $templates = array_merge( $templates, $this->templates ); // Add the modified cache to allow WordPress to pick it up for listing // available templates wp_cache_add( $cache_key, $templates, 'themes', 1800 ); return $atts; } /** * Checks if the template is assigned to the page */ public function view_project_template( $template ) { global $post; if(!isset($post->ID)) return $template; if (!isset($this->templates[get_post_meta( $post->ID, '_wp_page_template', true )] ) ) { return $template; } $file = plugin_dir_path(__FILE__). get_post_meta( $post->ID, '_wp_page_template', true ); // Just to be safe, we check if the file exist first if( file_exists( $file ) ) { return $file; } else { echo $file; } return $template; } }