91 lines
2.4 KiB
PHP
91 lines
2.4 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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use Symfony\Component\Validator\Exception\UnexpectedTypeException;
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/**
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* @author Bernhard Schussek <bschussek@gmail.com>
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*
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* @api
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*/
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class EmailValidator extends ConstraintValidator
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{
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/**
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* Checks if the passed value is valid.
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*
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* @param mixed $value The value that should be validated
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* @param Constraint $constraint The constraint for the validation
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*
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* @api
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*/
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public function validate($value, Constraint $constraint)
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{
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if (null === $value || '' === $value) {
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return;
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}
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if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
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throw new UnexpectedTypeException($value, 'string');
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}
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$value = (string) $value;
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$valid = filter_var($value, FILTER_VALIDATE_EMAIL);
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if ($valid) {
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$host = substr($value, strpos($value, '@') + 1);
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if (version_compare(PHP_VERSION, '5.3.3', '<') && strpos($host, '.') === false) {
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// Likely not a FQDN, bug in PHP FILTER_VALIDATE_EMAIL prior to PHP 5.3.3
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$valid = false;
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}
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// Check for host DNS resource records
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if ($valid && $constraint->checkMX) {
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$valid = $this->checkMX($host);
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} elseif ($valid && $constraint->checkHost) {
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$valid = $this->checkHost($host);
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}
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}
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if (!$valid) {
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$this->context->addViolation($constraint->message, array('{{ value }}' => $value));
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}
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}
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/**
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* Check DNS Records for MX type.
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*
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* @param string $host Hostname
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*
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* @return Boolean
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*/
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private function checkMX($host)
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{
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return checkdnsrr($host, 'MX');
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}
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/**
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* Check if one of MX, A or AAAA DNS RR exists.
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*
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* @param string $host Hostname
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*
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* @return Boolean
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*/
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private function checkHost($host)
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{
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return $this->checkMX($host) || (checkdnsrr($host, "A") || checkdnsrr($host, "AAAA"));
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}
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}
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