JezK
Edit File: page-template.class.php
<?php /** * Main class for plugin */ if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly. } if (!class_exists('G5ERE_Page_Template')): class G5ERE_Page_Template { private static $_instance; public static function getInstance() { if (self::$_instance == null) { self::$_instance = new self(); } return self::$_instance; } /** * The array of templates that this plugin tracks. */ protected $templates; public function init() { // Add your templates to this array. $this->templates = array( 'page-template/dashboard.php' => esc_html__('Dashboard','g5-ere'), ); // Add a filter to the attributes metabox to inject template into the cache. if ( version_compare( floatval( get_bloginfo( 'version' ) ), '4.7', '<' ) ) { // 4.6 and older add_filter( 'page_attributes_dropdown_pages_args', array( $this, 'register_project_templates' ) ); } else { // Add a filter to the wp 4.7 version attributes metabox add_filter( 'theme_page_templates', array( $this, 'add_new_template' ) ); } // 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') ); } /** * Adds our template to the page dropdown for v4.7+ * */ public function add_new_template( $posts_templates ) { $posts_templates = array_merge( $posts_templates, $this->templates ); return $posts_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 ) { // Get global post global $post; // Return template if post is empty if ( ! $post ) { return $template; } // Return default template if we don't have a custom one defined if ( ! isset( $this->templates[get_post_meta( $post->ID, '_wp_page_template', true )] ) ) { return $template; } $template_name = get_post_meta( $post->ID, '_wp_page_template', true ); $file = G5ERE()->locate_template($template_name); // Just to be safe, we check if the file exist first if ( file_exists( $file ) ) { return $file; } // Return template return $template; } } endif;