diff -r 000000000000 -r 4eba9c11703f web/Zend/Filter/StringToLower.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Filter/StringToLower.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,121 @@
+<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: StringToLower.php 22790 2010-08-03 19:16:33Z thomas $
+ */
+
+/**
+ * @see Zend_Filter_Interface
+ */
+require_once 'Zend/Filter/Interface.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Filter
+ * @copyright  Copyright (c) 2005-2010 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;
+
+    /**
+     * Constructor
+     *
+     * @param string|array|Zend_Config $options OPTIONAL
+     */
+    public function __construct($options = null)
+    {
+        if ($options instanceof Zend_Config) {
+            $options = $options->toArray();
+        } else if (!is_array($options)) {
+            $options = func_get_args();
+            $temp    = array();
+            if (!empty($options)) {
+                $temp['encoding'] = array_shift($options);
+            }
+            $options = $temp;
+        }
+
+        if (!array_key_exists('encoding', $options) && function_exists('mb_internal_encoding')) {
+            $options['encoding'] = mb_internal_encoding();
+        }
+
+        if (array_key_exists('encoding', $options)) {
+            $this->setEncoding($options['encoding']);
+        }
+    }
+
+    /**
+     * Returns the set encoding
+     *
+     * @return string
+     */
+    public function getEncoding()
+    {
+        return $this->_encoding;
+    }
+
+    /**
+     * Set the input encoding for the given string
+     *
+     * @param  string $encoding
+     * @return Zend_Filter_StringToLower Provides a fluent interface
+     * @throws Zend_Filter_Exception
+     */
+    public function setEncoding($encoding = null)
+    {
+        if ($encoding !== null) {
+            if (!function_exists('mb_strtolower')) {
+                require_once 'Zend/Filter/Exception.php';
+                throw new Zend_Filter_Exception('mbstring is required for this feature');
+            }
+
+            $encoding = (string) $encoding;
+            if (!in_array(strtolower($encoding), array_map('strtolower', mb_list_encodings()))) {
+                require_once 'Zend/Filter/Exception.php';
+                throw new Zend_Filter_Exception("The given encoding '$encoding' is not supported by mbstring");
+            }
+        }
+
+        $this->_encoding = $encoding;
+        return $this;
+    }
+
+    /**
+     * 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 !== null) {
+            return mb_strtolower((string) $value, $this->_encoding);
+        }
+
+        return strtolower((string) $value);
+    }
+}