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<?php
/**
* CCompareValidator 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/
*/

/**
* CCompareValidator compares the specified attribute value with another value and validates if they are equal.
*
* The value being compared with can be another attribute value
* (specified via {@link compareAttribute}) or a constant (specified via
* {@link compareValue}. When both are specified, the latter takes
* precedence. If neither is specified, the attribute will be compared
* with another attribute whose name is by appending "_repeat" to the source
* attribute name.
*
* The comparison can be either {@link strict} or not.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.validators
* @since 1.0
*/
class CCompareValidator extends CValidator
{
/**
* @var string the name of the attribute to be compared with
*/
public $compareAttribute;
/**
* @var string the constant value to be compared with
*/
public $compareValue;
/**
* @var boolean whether the comparison is strict (both value and type must be the same.)
* Defaults to false.
*/
public $strict=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 || $value===''))
return;
if($this->compareValue!==null)
$compareValue=$this->compareValue;
else
{
if($this->compareAttribute===null)
$compareValue=$object->{$attribute.'_repeat'};
else
$compareValue=$object->{$this->compareAttribute};
}
if(($this->strict && $value!==$compareValue) || (!$this->strict && $value!=$compareValue))
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be repeated exactly.');
$this->addError($object,$attribute,$message);
}
}
}
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