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diff --git a/php/classes/UploadException.class.php b/php/classes/UploadException.class.php
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+<?php
+
+/**
+ * Returns a human readable error description for file upload errors.
+ *
+ * @author Dan Brown <danbrown@php.net>
+ * @author Michiel Thalen
+ * @copyright
+ * -------------------------------------------------------------------- 
+ *                   The PHP License, version 3.01
+ * Copyright (c) 1999 - 2014 The PHP Group. All rights reserved.
+ * -------------------------------------------------------------------- 
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, is permitted provided that the following conditions
+ * are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in
+ *      the documentation and/or other materials provided with the
+ *      distribution.
+ *
+ *   3. The name "PHP" must not be used to endorse or promote products
+ *      derived from this software without prior written permission. For
+ *      written permission, please contact group@php.net.
+ *
+ *   4. Products derived from this software may not be called "PHP", nor
+ *      may "PHP" appear in their name, without prior written permission
+ *      from group@php.net.  You may indicate that your software works in
+ *      conjunction with PHP by saying "Foo for PHP" instead of calling
+ *      it "PHP Foo" or "phpfoo"
+ *
+ *   5. The PHP Group may publish revised and/or new versions of the
+ *      license from time to time. Each version will be given a
+ *      distinguishing version number.
+ *      Once covered code has been published under a particular version
+ *      of the license, you may always continue to use it under the terms
+ *      of that version. You may also choose to use such covered code
+ *      under the terms of any subsequent version of the license
+ *      published by the PHP Group. No one other than the PHP Group has
+ *      the right to modify the terms applicable to covered code created
+ *      under this License.
+ *
+ *   6. Redistributions of any form whatsoever must retain the following
+ *      acknowledgment:
+ *      "This product includes PHP software, freely available from
+ *      <http://www.php.net/software/>".
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PHP DEVELOPMENT TEAM ``AS IS'' AND 
+ * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE PHP
+ * DEVELOPMENT TEAM OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * -------------------------------------------------------------------- 
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the PHP Group.
+ *
+ * The PHP Group can be contacted via Email at group@php.net.
+ *
+ * For more information on the PHP Group and the PHP project, 
+ * please see <http://www.php.net>.
+ *
+ * PHP includes the Zend Engine, freely available at
+ * <http://www.zend.com>.
+ */
+
+class UploadException extends Exception
+{
+    public function __construct($code)
+    {
+        $message = $this->codeToMessage($code);
+        parent::__construct($message, 500);
+    }
+
+    private function codeToMessage($code)
+    {
+        switch ($code) {
+            case UPLOAD_ERR_INI_SIZE:
+                $message = 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
+                break;
+            case UPLOAD_ERR_FORM_SIZE:
+                $message = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was '.
+                           'specified in the HTML form';
+                break;
+            case UPLOAD_ERR_PARTIAL:
+                $message = 'The uploaded file was only partially uploaded';
+                break;
+            case UPLOAD_ERR_NO_FILE:
+                $message = 'No file was uploaded';
+                break;
+            case UPLOAD_ERR_NO_TMP_DIR:
+                $message = 'Missing a temporary folder';
+                break;
+            case UPLOAD_ERR_CANT_WRITE:
+                $message = 'Failed to write file to disk';
+                break;
+            case UPLOAD_ERR_EXTENSION:
+                $message = 'File upload stopped by extension';
+                break;
+
+            default:
+                $message = 'Unknown upload error';
+                break;
+        }
+
+        return $message;
+    }
+}