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diff --git a/admin/survey/excel/PHPExcel/Worksheet/RowIterator.php b/admin/survey/excel/PHPExcel/Worksheet/RowIterator.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_Worksheet
+ * @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_Worksheet_RowIterator
+ *
+ * Used to iterate rows in a PHPExcel_Worksheet
+ *
+ * @category   PHPExcel
+ * @package	PHPExcel_Worksheet
+ * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ */
+class PHPExcel_Worksheet_RowIterator implements Iterator
+{
+	/**
+	 * PHPExcel_Worksheet to iterate
+	 *
+	 * @var PHPExcel_Worksheet
+	 */
+	private $_subject;
+
+	/**
+	 * Current iterator position
+	 *
+	 * @var int
+	 */
+	private $_position = 1;
+
+	/**
+	 * Start position
+	 *
+	 * @var int
+	 */
+	private $_startRow = 1;
+
+
+	/**
+	 * Create a new row iterator
+	 *
+	 * @param	PHPExcel_Worksheet	$subject	The worksheet to iterate over
+	 * @param	integer				$startRow	The row number at which to start iterating
+	 */
+	public function __construct(PHPExcel_Worksheet $subject = null, $startRow = 1) {
+		// Set subject
+		$this->_subject = $subject;
+		$this->resetStart($startRow);
+	}
+
+	/**
+	 * Destructor
+	 */
+	public function __destruct() {
+		unset($this->_subject);
+	}
+
+	/**
+	 * (Re)Set the start row and the current row pointer
+	 *
+	 * @param integer	$startRow	The row number at which to start iterating
+	 */
+	public function resetStart($startRow = 1) {
+		$this->_startRow = $startRow;
+		$this->seek($startRow);
+	}
+
+	/**
+	 * Set the row pointer to the selected row
+	 *
+	 * @param integer	$row	The row number to set the current pointer at
+	 */
+	public function seek($row = 1) {
+		$this->_position = $row;
+	}
+
+	/**
+	 * Rewind the iterator to the starting row
+	 */
+	public function rewind() {
+		$this->_position = $this->_startRow;
+	}
+
+	/**
+	 * Return the current row in this worksheet
+	 *
+	 * @return PHPExcel_Worksheet_Row
+	 */
+	public function current() {
+		return new PHPExcel_Worksheet_Row($this->_subject, $this->_position);
+	}
+
+	/**
+	 * Return the current iterator key
+	 *
+	 * @return int
+	 */
+	public function key() {
+		return $this->_position;
+	}
+
+	/**
+	 * Set the iterator to its next value
+	 */
+	public function next() {
+		++$this->_position;
+	}
+
+	/**
+	 * Set the iterator to its previous value
+	 */
+	public function prev() {
+		if ($this->_position > 1)
+			--$this->_position;
+	}
+
+	/**
+	 * Indicate if more rows exist in the worksheet
+	 *
+	 * @return boolean
+	 */
+	public function valid() {
+		return $this->_position <= $this->_subject->getHighestRow();
+	}
+}