--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Filter/RealPath.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,134 @@
+<?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: RealPath.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @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_RealPath implements Zend_Filter_Interface
+{
+    /**
+     * @var boolean $_pathExists
+     */
+    protected $_exists = true;
+
+    /**
+     * Class constructor
+     *
+     * @param boolean|Zend_Config $options Options to set
+     */
+    public function __construct($options = true)
+    {
+        $this->setExists($options);
+    }
+
+    /**
+     * Returns true if the filtered path must exist
+     *
+     * @return boolean
+     */
+    public function getExists()
+    {
+        return $this->_exists;
+    }
+
+    /**
+     * Sets if the path has to exist
+     * TRUE when the path must exist
+     * FALSE when not existing paths can be given
+     *
+     * @param boolean|Zend_Config $exists Path must exist
+     * @return Zend_Filter_RealPath
+     */
+    public function setExists($exists)
+    {
+        if ($exists instanceof Zend_Config) {
+            $exists = $exists->toArray();
+        }
+
+        if (is_array($exists)) {
+            if (isset($exists['exists'])) {
+                $exists = (boolean) $exists['exists'];
+            }
+        }
+
+        $this->_exists = (boolean) $exists;
+        return $this;
+    }
+
+    /**
+     * Defined by Zend_Filter_Interface
+     *
+     * Returns realpath($value)
+     *
+     * @param  string $value
+     * @return string
+     */
+    public function filter($value)
+    {
+        $path = (string) $value;
+        if ($this->_exists) {
+            return realpath($path);
+        }
+
+        $realpath = @realpath($path);
+        if ($realpath) {
+            return $realpath;
+        }
+
+        $drive = '';
+        if (substr(PHP_OS, 0, 3) == 'WIN') {
+            $path = preg_replace('/[\\\\\/]/', DIRECTORY_SEPARATOR, $path);
+            if (preg_match('/([a-zA-Z]\:)(.*)/', $path, $matches)) {
+                list($fullMatch, $drive, $path) = $matches;
+            } else {
+                $cwd   = getcwd();
+                $drive = substr($cwd, 0, 2);
+                if (substr($path, 0, 1) != DIRECTORY_SEPARATOR) {
+                    $path = substr($cwd, 3) . DIRECTORY_SEPARATOR . $path;
+                }
+            }
+        } elseif (substr($path, 0, 1) != DIRECTORY_SEPARATOR) {
+            $path = getcwd() . DIRECTORY_SEPARATOR . $path;
+        }
+
+        $stack = array();
+        $parts = explode(DIRECTORY_SEPARATOR, $path);
+        foreach ($parts as $dir) {
+            if (strlen($dir) && $dir !== '.') {
+                if ($dir == '..') {
+                    array_pop($stack);
+                } else {
+                    array_push($stack, $dir);
+                }
+            }
+        }
+
+        return $drive . DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $stack);
+    }
+}