'wpforms_frontend_output', 'classname' => __CLASS__, 'inject_function' => 'injectLeadEvent')); } public static function injectLeadEvent($form_data) { if (FacebookPluginUtils::isAdmin()) { return; } $param = array(); $pixel_code = FacebookPixel::getPixelLeadCode($param, self::TRACKING_NAME, false); $listener_code = sprintf( self::$leadJS, $pixel_code); printf(" ", $listener_code); } }