meta_key = '_wp_page_template'; $default = array_values( get_post_types() ); $this->allowed_post_types = apply_filters( 'admin_column_template_allowed_post_types', $default ); } public function hooks() { foreach ( (array) $this->allowed_post_types as $post_type ) { // this "s" is mandatory here add_filter( 'manage_' . $post_type . 's_custom_column' , [ $this, 'column_content' ], 111, 2 ); add_filter( 'manage_' . $post_type . 's_columns' , [ $this, 'add_column' ] ); } add_filter( 'restrict_manage_posts', [ $this, 'add_select_by' ] ); add_action( 'pre_get_posts', [ $this, 'pre_get_posts' ] ); add_filter( 'admin_column_template_info', [ $this, 'flip_name' ], 10 , 4 ); } /** * Make the real name as default display * still "overridable" * @param $info * @param $post_id * @param $theme * @param $template * @author Julien Maury * @return string */ public function flip_name( $info, $post_id, $theme, $template ) { $templates = array_flip( get_page_templates() ); if ( ! isset( $templates[ $template ] ) ) { return $info; } return $theme->get( 'Name' ) . ' : ' . $templates[ $template ]; } /** * @return self */ final public static function getInstance() { if ( is_null( self::$instance ) ) { self::$instance = new static; } return self::$instance; } /** * Provide select by template * @author Julien Maury */ public function add_select_by() { echo ''; echo '' . __( 'Template' ) . ''; foreach ( get_page_templates() as $name => $template ) { $selected = isset( $_GET['_page_template'] ) ? selected( esc_attr( $_GET['_page_template'] ), esc_attr( $template ), false ) : ''; echo '' . esc_html( $name ) . ''; } echo ''; } /** * @param $query * @author Julien Maury * @return mixed */ public function pre_get_posts( $query ) { // don't mess up with other queries if ( ! is_admin() ) { return false; } if ( ! empty( $_GET['_page_template'] ) ) { $query->set( 'meta_query', [ [ 'key' => $this->meta_key, 'value' => esc_html( $_GET['_page_template'] ), 'compare' => '=', ] ] ); } } /** * @param $column * @param $post_id * @author Julien Maury */ public function column_content( $column, $post_id ) { if ( 'template_name' === $column ) { echo $this->get_template( $post_id ); } } /** * @param $columns * @author Julien Maury * @return array */ public function add_column( $columns ) { return array_merge( $columns, array( 'template_name' => __( 'Template' ), ) ); } /** * @author Julien Maury * * @param $post_id * * @return false|string */ public function get_template( $post_id ) { $theme = wp_get_theme(); $template = get_post_meta( $post_id, $this->meta_key, true ); if ( empty( $template ) || 'default' === $template ) { return __( 'None' ); } return apply_filters( 'admin_column_template_info', $theme->get( 'Name' ) . ' : ' . $template, $post_id, $theme, $template ); } } add_action( 'plugins_loaded', function() { if ( ! is_admin() ) { return false; } $i = Admin_Column_Template::getInstance(); $i->hooks(); });