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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_Filter
* @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: StringToLower.php 8064 2008-02-16 10:58:39Z thomas $
*/
/**
* @see Zend_Filter_Interface
*/
require_once 'Zend/Filter/Interface.php';
/**
* @category Zend
* @package Zend_Filter
* @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_Filter_StringToLower implements Zend_Filter_Interface
{
/**
* Encoding for the input string
*
* @var string
*/
protected $_encoding = null;
/**
* Set the input encoding for the given string
*
* @param string $encoding
* @throws Zend_Filter_Exception
*/
public function setEncoding($encoding = null)
{
if (!function_exists('mb_strtolower')) {
require_once 'Zend/Filter/Exception.php';
throw new Zend_Filter_Exception('mbstring is required for this feature');
}
$this->_encoding = $encoding;
}
/**
* Defined by Zend_Filter_Interface
*
* Returns the string $value, converting characters to lowercase as necessary
*
* @param string $value
* @return string
*/
public function filter($value)
{
if ($this->_encoding) {
return mb_strtolower((string) $value, $this->_encoding);
}
return strtolower((string) $value);
}
}
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