_id = strtolower( get_class( $this ) ); $this->_title = __( 'Metabox', 'ninja-forms' ); add_action( 'save_post', array( $this, '_save_post' ) ); add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) ); } public function add_meta_boxes() { add_meta_box( $this->_id, $this->_title, array( $this, $this->_callback ), $this->_post_types, $this->_context, $this->_priority, $this->_callback_args ); } abstract public function render_metabox( $post, $metabox ); public function _save_post( $post_id ) { // If this is an autosave, our form has not been submitted, so we don't want to do anything. if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return; $this->save_post( $post_id ); } protected function save_post( $post_id ) { // This section intentionally left blank. } }