diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Serializer/Adapter/Json.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Serializer/Adapter/Json.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,93 @@
+<?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_Serializer
+ * @subpackage Adapter
+ * @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: Json.php 20574 2010-01-24 17:39:14Z mabe $
+ */
+
+/** @see Zend_Serializer_Adapter_AdapterAbstract */
+require_once 'Zend/Serializer/Adapter/AdapterAbstract.php';
+
+/** @see Zend_Json */
+require_once 'Zend/Json.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Serializer
+ * @subpackage Adapter
+ * @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_Serializer_Adapter_Json extends Zend_Serializer_Adapter_AdapterAbstract
+{
+    /**
+     * @var array Default options
+     */
+    protected $_options = array(
+        'cycleCheck'           => false,
+        'enableJsonExprFinder' => false,
+        'objectDecodeType'     => Zend_Json::TYPE_ARRAY,
+    );
+
+    /**
+     * Serialize PHP value to JSON
+     * 
+     * @param  mixed $value 
+     * @param  array $opts 
+     * @return string
+     * @throws Zend_Serializer_Exception on JSON encoding exception
+     */
+    public function serialize($value, array $opts = array())
+    {
+        $opts = $opts + $this->_options;
+
+        try  {
+            return Zend_Json::encode($value, $opts['cycleCheck'], $opts);
+        } catch (Exception $e) {
+            require_once 'Zend/Serializer/Exception.php';
+            throw new Zend_Serializer_Exception('Serialization failed', 0, $e);
+        }
+    }
+
+    /**
+     * Deserialize JSON to PHP value
+     * 
+     * @param  string $json 
+     * @param  array $opts 
+     * @return mixed
+     */
+    public function unserialize($json, array $opts = array())
+    {
+        $opts = $opts + $this->_options;
+
+        try {
+            $ret = Zend_Json::decode($json, $opts['objectDecodeType']);
+        } catch (Exception $e) {
+            require_once 'Zend/Serializer/Exception.php';
+            throw new Zend_Serializer_Exception('Unserialization failed by previous error', 0, $e);
+        }
+
+        // json_decode returns null for invalid JSON
+        if ($ret === null && $json !== 'null') {
+            require_once 'Zend/Serializer/Exception.php';
+            throw new Zend_Serializer_Exception('Invalid json data');
+        }
+
+        return $ret;
+    }
+}