:  mail(): Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in 
 

'From: noreply@email.com' . "\r\n" .
'Reply-To: micorreo@gmail.com' . "\r\n" .
'X-Mailer: ?'.
'MIME-Version: 1.0' . "\r\n".
 

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/.*([0-9]{20}[A-Z]{2}).*/g, '$1');

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/.*([0-9]{20}[A-Z]{2}).*/g, '$1');

[^0-9]{20}

[^A-Z]{21,22}

const tests = [
  '1234567890AB',
  '1234567890AB1234567890',
  '12345678901234567890AABB',
  '123456789012345678901A',
  '1234567890123456789AB2',
  '$$$$$$$$$$$$$$$$$$$$00',
  'dsakdsakldjaksljdklasa',
  'askjdasdjklasjdkasjd12',
  '12345678901234567890AB',
];
 
const regexCode = /[0-9]{20}[A-Z]{2}$/g;
 
tests.forEach(function(value) {
 
  if (!regexCode.test(value)) {
    console.log(value + ' no es un codigo valido');
  }
 
});

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/[0-9]{20}[A-Z]{2}/g, '');
 

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/^[0-9]{20}[A-Z]{2}/g, '');
 

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/[^0-9]{20}[^A-Z]{2}/g, '');
 

form_verify_email.verify_code.value = String(form_verify_email.verify_code.value).replace(/[^0-9]{20}[^A-Z]{21,22}/g, '');
 

if(users::Check_Email_Verified($_SESSION['id_user']) == false)
{
	?>
    	<script type="text/javascript">
        window.location.href = 'verify_email';
        </script>
        <?php
}
 

        function Check_Email_Verified($id_user)
	{
		$con = Connection('root', '');
		$query = $con->prepare('SELECT (email_verified) FROM usuarios WHERE id_user = :id_user');
		$query->execute(array(':id_user' => $id_user));
		$results = $query->fetchAll();
 
		$result = false;
 
		if(!empty($results))
		{
			if($results[0]['email_verified'] == 1)
			{
				$result = true;
			}
		}
 
		return $result;
	}
 

if($_SESSION['email_verified'] == false)
{
     [Redirige a x pagina]
}