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<?php
/*
* $Id: Email.php 6468 2009-10-09 20:41:28Z jwage $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.org>.
*/
/**
* Doctrine_Validator_Email
*
* @package Doctrine
* @subpackage Validator
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.org
* @since 1.0
* @version $Revision: 6468 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Validator_Email extends Doctrine_Validator_Driver
{
/**
* checks if given value is a valid email address
*
* @link http://iamcal.com/publish/articles/php/parsing_email/pdf/
* @param mixed $value
* @return boolean
*/
public function validate($value)
{
if (is_null($value)) {
return true;
}
if (isset($this->args) && (! isset($this->args['check_mx']) || $this->args['check_mx'] == true)) {
$parts = explode('@', $value);
if (isset($parts[1]) && $parts[1] && ! $this->_checkMX($parts[1])) {
return false;
}
}
$e = explode('.', $value);
$tld = end($e);
if (preg_match("/[^a-zA-Z]/", $tld)) {
return false;
}
$qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
$dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
$atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
$quotedPair = '\\x5c[\\x00-\\x7f]';
$domainLiteral = "\\x5b($dtext|$quotedPair)*\\x5d";
$quotedString = "\\x22($qtext|$quotedPair)*\\x22";
$domainRef = $atom;
$subDomain = "($domainRef|$domainLiteral)";
$word = "($atom|$quotedString)";
$domain = "$subDomain(\\x2e$subDomain)+";
/*
following pseudocode to allow strict checking - ask pookey about this if you're puzzled
if ($this->getValidationOption('strict_checking') == true) {
$domain = "$sub_domain(\\x2e$sub_domain)*";
}
*/
$localPart = "$word(\\x2e$word)*";
$addrSpec = "$localPart\\x40$domain";
return (bool) preg_match("!^$addrSpec$!D", $value);
}
/**
* Check DNA Records for MX type
*
* @param string $host Host name
* @return boolean
*/
private function _checkMX($host)
{
// We have different behavior here depending of OS and PHP version
if (strtolower(substr(PHP_OS, 0, 3)) == 'win' && version_compare(PHP_VERSION, '5.3.0', '<')) {
$output = array();
@exec('nslookup -type=MX '.escapeshellcmd($host) . ' 2>&1', $output);
if (empty($output)) {
throw new Doctrine_Exception('Unable to execute DNS lookup. Are you sure PHP can call exec()?');
}
foreach ($output as $line) {
if (preg_match('/^'.$host.'/', $line)) {
return true;
}
}
return false;
} else if (function_exists('checkdnsrr')) {
return checkdnsrr($host, 'MX');
}
throw new Doctrine_Exception('Could not retrieve DNS record information. Remove check_mx = true to prevent this warning');
}
}
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