88 lines
2.2 KiB
PHP
88 lines
2.2 KiB
PHP
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<?php
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namespace Symfony\Components\Validator\Constraints;
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use Symfony\Components\Validator\Constraint;
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use Symfony\Components\Validator\ConstraintValidator;
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use Symfony\Components\Validator\Exception\UnexpectedTypeException;
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class EmailValidator extends ConstraintValidator
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{
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const PATTERN = '/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i';
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public function isValid($value, Constraint $constraint)
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{
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if ($value === null)
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{
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return true;
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}
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if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString()')))
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{
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throw new UnexpectedTypeException($value, 'string');
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}
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$value = (string)$value;
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if (!preg_match(self::PATTERN, $value))
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{
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$this->setMessage($constraint->message, array('value' => $value));
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return false;
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}
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if ($constraint->checkMX)
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{
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$host = substr($value, strpos($value, '@'));
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if (!$this->checkMX($host))
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{
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$this->setMessage($constraint->message, array('value' => $value));
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return false;
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}
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}
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return true;
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}
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/**
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* Check DNA Records for MX type (from Doctrine EmailValidator)
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*
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* @param string $host Host name
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* @return boolean
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* @licence This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.org>.
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*/
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private function checkMX($host)
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{
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// We have different behavior here depending of OS and PHP version
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if (strtolower(substr(PHP_OS, 0, 3)) == 'win' && version_compare(PHP_VERSION, '5.3.0', '<')) {
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$output = array();
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@exec('nslookup -type=MX '.escapeshellcmd($host) . ' 2>&1', $output);
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if (empty($output))
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{
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throw new ValidatorError('Unable to execute DNS lookup. Are you sure PHP can call exec()?');
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}
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foreach ($output as $line)
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{
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if (preg_match('/^'.$host.'/', $line))
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{
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return true;
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}
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}
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return false;
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}
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else if (function_exists('checkdnsrr'))
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{
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return checkdnsrr($host, 'MX');
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}
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throw new ValidatorError('Could not retrieve DNS record information. Remove check_mx = true to prevent this warning');
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}
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}
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