namespace, $this->rest_base, array( 'methods' => 'POST', 'callback' => array( $this, 'clean' ), 'permission_callback' => array( $this, 'permission_callback' ), ) ); } public function clean() { $scan_data = get_transient( 'string-locator-search-overview' ); for ( $i = 0; $i < $scan_data->chunks; $i ++ ) { delete_transient( 'string-locator-search-files-' . $i ); } wp_send_json_success( true ); } } new Clean();