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Edit File: ZipArchive.php

<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2011 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_ZipArchive
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.7.6, 2011-02-27
 */

require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/PCLZip/pclzip.lib.php';

/**
 * PHPExcel_Shared_ZipArchive
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared_ZipArchive
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Shared_ZipArchive
{

/**
	 * Temporary storage directory
	 *
	 * @var string
	 */
	private $_tempDir;

/**
	 * Zip Archive Stream Handle
	 *
	 * @var string
	 */
	private $_zip;

public function open($fileName)
	{
		$this->_tempDir = PHPExcel_Shared_File::sys_get_temp_dir();

$this->_zip = new PclZip($fileName);

return true;
	}

public function close()
	{
	}

public function addFromString($localname, $contents)
	{
		$filenameParts = pathinfo($localname);

$handle = fopen($this->_tempDir.'/'.$filenameParts["basename"], "wb");
		fwrite($handle, $contents);
		fclose($handle);

$res = $this->_zip->add($this->_tempDir.'/'.$filenameParts["basename"],
								PCLZIP_OPT_REMOVE_PATH, $this->_tempDir,
								PCLZIP_OPT_ADD_PATH, $filenameParts["dirname"]
							   );
		if ($res == 0) {
			throw new Exception("Error zipping files : " . $this->_zip->errorInfo(true));
		}

unlink($this->_tempDir.'/'.$filenameParts["basename"]);
	}

}

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