Deprecated: Return type of Zend\Stdlib\ArrayStack::getIterator() should either be compatible with ArrayObject::getIterator(): Iterator, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/phpkobo/research/php-downloaded-apps/phpmailer-5-2-16/PHPMailer-5.2.16/vendor/zendframework/zend-stdlib/src/ArrayStack.php on line 28