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<?php
/**
* CEmailValidator class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2009 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CEmailValidator validates that the attribute value is a valid email address.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.validators
* @since 1.0
*/
class CEmailValidator extends CValidator
{
/**
* @var string the regular expression used to validate the attribute value.
*/
public $pattern='/^\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$/';
/**
* @var string the regular expression used to validate email addresses with the name part.
* This property is used only when {@link allowName} is true.
* @since 1.0.5
* @see allowName
*/
public $fullPattern='/^[^@]*<\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*>$/';
/**
* @var boolean whether to allow name in the email address (e.g. "Qiang Xue <qiang.xue@gmail.com>"). Defaults to false.
* @since 1.0.5
* @see fullPattern
*/
public $allowName=false;
/**
* @var boolean whether to check the MX record for the email address.
* Defaults to false. To enable it, you need to make sure the PHP function 'checkdnsrr'
* exists in your PHP installation.
*/
public $checkMX=false;
/**
* @var boolean whether to check port 25 for the email address.
* Defaults to false.
* @since 1.0.4
*/
public $checkPort=false;
/**
* @var boolean whether the attribute value can be null or empty. Defaults to true,
* meaning that if the attribute is empty, it is considered valid.
*/
public $allowEmpty=true;

/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param CModel the object being validated
* @param string the attribute being validated
*/
protected function validateAttribute($object,$attribute)
{
$value=$object->$attribute;
if($this->allowEmpty && ($value===null || $value===''))
return;
$valid=preg_match($this->pattern,$value) || $this->allowName && preg_match($this->fullPattern,$value);
if($valid)
$domain=rtrim(substr($value,strpos($value,'@')+1),'>');
if($valid && $this->checkMX && function_exists('checkdnsrr'))
$valid=checkdnsrr($domain,'MX');
if($valid && $this->checkPort && function_exists('fsockopen'))
$valid=fsockopen($domain,25)!==false;
if(!$valid)
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} is not a valid email address.');
$this->addError($object,$attribute,$message);
}
}
}
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