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diff --git a/admin/survey/excel/PHPExcel/Shared/PasswordHasher.php b/admin/survey/excel/PHPExcel/Shared/PasswordHasher.php
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+<?php
+/**
+ * PHPExcel
+ *
+ * Copyright (c) 2006 - 2012 PHPExcel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel_Shared
+ * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
+ * @version    1.7.8, 2012-10-12
+ */
+
+
+/**
+ * PHPExcel_Shared_PasswordHasher
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel_Shared
+ * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ */
+class PHPExcel_Shared_PasswordHasher
+{
+	/**
+	 * Create a password hash from a given string.
+	 *
+	 * This method is based on the algorithm provided by
+	 * Daniel Rentz of OpenOffice and the PEAR package
+	 * Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.
+	 *
+	 * @param 	string	$pPassword	Password to hash
+	 * @return 	string				Hashed password
+	 */
+	public static function hashPassword($pPassword = '') {
+        $password = 0x0000;
+        $i        = 1;       // char position
+
+        // split the plain text password in its component characters
+        $chars = preg_split('//', $pPassword, -1, PREG_SPLIT_NO_EMPTY);
+        foreach ($chars as $char) {
+            $value        = ord($char) << $i;   // shifted ASCII value
+            $rotated_bits = $value >> 15;       // rotated bits beyond bit 15
+            $value       &= 0x7fff;             // first 15 bits
+            $password    ^= ($value | $rotated_bits);
+            ++$i;
+        }
+
+        $password ^= strlen($pPassword);
+        $password ^= 0xCE4B;
+
+        return(strtoupper(dechex($password)));
+	}
+}