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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Validate
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: EmailAddress.php 8986 2008-03-21 21:38:32Z matthew $
*/
/**
* @see Zend_Validate_Abstract
*/
require_once 'external/Zend/Validate/Abstract.php';
/**
* @see Zend_Validate_Hostname
*/
require_once 'external/Zend/Validate/Hostname.php';
/**
* @category Zend
* @package Zend_Validate
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Validate_EmailAddress extends Zend_Validate_Abstract {
const INVALID = 'emailAddressInvalid';
const INVALID_HOSTNAME = 'emailAddressInvalidHostname';
const INVALID_MX_RECORD = 'emailAddressInvalidMxRecord';
const DOT_ATOM = 'emailAddressDotAtom';
const QUOTED_STRING = 'emailAddressQuotedString';
const INVALID_LOCAL_PART = 'emailAddressInvalidLocalPart';
/**
* @var array
*/
protected $_messageTemplates = array(
self::INVALID => "'%value%' is not a valid email address in the basic format local-part@hostname",
self::INVALID_HOSTNAME => "'%hostname%' is not a valid hostname for email address '%value%'",
self::INVALID_MX_RECORD => "'%hostname%' does not appear to have a valid MX record for the email address '%value%'",
self::DOT_ATOM => "'%localPart%' not matched against dot-atom format",
self::QUOTED_STRING => "'%localPart%' not matched against quoted-string format",
self::INVALID_LOCAL_PART => "'%localPart%' is not a valid local part for email address '%value%'");
/**
* @var array
*/
protected $_messageVariables = array('hostname' => '_hostname', 'localPart' => '_localPart');
/**
* Local object for validating the hostname part of an email address
*
* @var Zend_Validate_Hostname
*/
public $hostnameValidator;
/**
* Whether we check for a valid MX record via DNS
*
* @var boolean
*/
protected $_validateMx = false;
/**
* @var string
*/
protected $_hostname;
/**
* @var string
*/
protected $_localPart;
/**
* Instantiates hostname validator for local use
*
* You can pass a bitfield to determine what types of hostnames are allowed.
* These bitfields are defined by the ALLOW_* constants in Zend_Validate_Hostname
* The default is to allow DNS hostnames only
*
* @param integer $allow OPTIONAL
* @param bool $validateMx OPTIONAL
* @param Zend_Validate_Hostname $hostnameValidator OPTIONAL
* @return void
*/
public function __construct($allow = Zend_Validate_Hostname::ALLOW_DNS, $validateMx = false, Zend_Validate_Hostname $hostnameValidator = null) {
$this->setValidateMx($validateMx);
$this->setHostnameValidator($hostnameValidator, $allow);
}
/**
* @param Zend_Validate_Hostname $hostnameValidator OPTIONAL
* @param int $allow OPTIONAL
* @return void
*/
public function setHostnameValidator(Zend_Validate_Hostname $hostnameValidator = null, $allow = Zend_Validate_Hostname::ALLOW_DNS) {
if ($hostnameValidator === null) {
$hostnameValidator = new Zend_Validate_Hostname($allow);
}
$this->hostnameValidator = $hostnameValidator;
}
/**
* Whether MX checking via dns_get_mx is supported or not
*
* This currently only works on UNIX systems
*
* @return boolean
*/
public function validateMxSupported() {
return function_exists('dns_get_mx');
}
/**
* Set whether we check for a valid MX record via DNS
*
* This only applies when DNS hostnames are validated
*
* @param boolean $allowed Set allowed to true to validate for MX records, and false to not validate them
*/
public function setValidateMx($allowed) {
$this->_validateMx = (bool)$allowed;
}
/**
* Defined by Zend_Validate_Interface
*
* Returns true if and only if $value is a valid email address
* according to RFC2822
*
* @link http://www.ietf.org/rfc/rfc2822.txt RFC2822
* @link http://www.columbia.edu/kermit/ascii.html US-ASCII characters
* @param string $value
* @return boolean
*/
public function isValid($value) {
$valueString = (string)$value;
$this->_setValue($valueString);
// Split email address up
if (! preg_match('/^(.+)@([^@]+)$/', $valueString, $matches)) {
$this->_error(self::INVALID);
return false;
}
$this->_localPart = $matches[1];
$this->_hostname = $matches[2];
// Match hostname part
$hostnameResult = $this->hostnameValidator->setTranslator($this->getTranslator())->isValid($this->_hostname);
if (! $hostnameResult) {
$this->_error(self::INVALID_HOSTNAME);
// Get messages and errors from hostnameValidator
foreach ($this->hostnameValidator->getMessages() as $message) {
$this->_messages[] = $message;
}
foreach ($this->hostnameValidator->getErrors() as $error) {
$this->_errors[] = $error;
}
}
// MX check on hostname via dns_get_record()
if ($this->_validateMx) {
if ($this->validateMxSupported()) {
$result = dns_get_mx($this->_hostname, $mxHosts);
if (count($mxHosts) < 1) {
$hostnameResult = false;
$this->_error(self::INVALID_MX_RECORD);
}
} else {
/**
* MX checks are not supported by this system
* @see Zend_Validate_Exception
*/
require_once 'external/Zend/Validate/Exception.php';
throw new Zend_Validate_Exception('Internal error: MX checking not available on this system');
}
}
// First try to match the local part on the common dot-atom format
$localResult = false;
// Dot-atom characters are: 1*atext *("." 1*atext)
// atext: ALPHA / DIGIT / and "!", "#", "$", "%", "&", "'", "*",
// "-", "/", "=", "?", "^", "_", "`", "{", "|", "}", "~"
$atext = 'a-zA-Z0-9\x21\x23\x24\x25\x26\x27\x2a\x2b\x2d\x2f\x3d\x3f\x5e\x5f\x60\x7b\x7c\x7d';
if (preg_match('/^[' . $atext . ']+(\x2e+[' . $atext . ']+)*$/', $this->_localPart)) {
$localResult = true;
} else {
// Try quoted string format
// Quoted-string characters are: DQUOTE *([FWS] qtext/quoted-pair) [FWS] DQUOTE
// qtext: Non white space controls, and the rest of the US-ASCII characters not
// including "\" or the quote character
$noWsCtl = '\x01-\x08\x0b\x0c\x0e-\x1f\x7f';
$qtext = $noWsCtl . '\x21\x23-\x5b\x5d-\x7e';
$ws = '\x20\x09';
if (preg_match('/^\x22([' . $ws . $qtext . '])*[$ws]?\x22$/', $this->_localPart)) {
$localResult = true;
} else {
$this->_error(self::DOT_ATOM);
$this->_error(self::QUOTED_STRING);
$this->_error(self::INVALID_LOCAL_PART);
}
}
// If both parts valid, return true
if ($localResult && $hostnameResult) {
return true;
} else {
return false;
}
}
}
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