source: sourcecode/application/libraries/PHPExcel/Shared/ZipArchive.php @ 1

<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 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 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    1.8.0, 2014-03-02
 */

if (!defined('PCLZIP_TEMPORARY_DIR')) {
        define('PCLZIP_TEMPORARY_DIR', PHPExcel_Shared_File::sys_get_temp_dir());
}
require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/PCLZip/pclzip.lib.php';


/**
 * PHPExcel_Shared_ZipArchive
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared_ZipArchive
 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Shared_ZipArchive
{

        /**     constants */
        const OVERWRITE         = 'OVERWRITE';
        const CREATE            = 'CREATE';


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

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


    /**
         * Open a new zip archive
         *
         * @param       string  $fileName       Filename for the zip archive
         * @return      boolean
     */
        public function open($fileName)
        {
                $this->_tempDir = PHPExcel_Shared_File::sys_get_temp_dir();

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

                return true;
        }


    /**
         * Close this zip archive
         *
     */
        public function close()
        {
        }


    /**
         * Add a new file to the zip archive from a string of raw data.
         *
         * @param       string  $localname              Directory/Name of the file to add to the zip archive
         * @param       string  $contents               String of data to add to the zip archive
     */
        public function addFromString($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 PHPExcel_Writer_Exception("Error zipping files : " . $this->_zip->errorInfo(true));
                }

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

    /**
     * Find if given fileName exist in archive (Emulate ZipArchive locateName())
     *
     * @param        string        $fileName        Filename for the file in zip archive
     * @return        boolean
     */
    public function locateName($fileName)
    {
        $list = $this->_zip->listContent();
        $listCount = count($list);
        $list_index = -1;
        for ($i = 0; $i < $listCount; ++$i) {
            if (strtolower($list[$i]["filename"]) == strtolower($fileName) ||
                strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                $list_index = $i;
                break;
            }
        }
        return ($list_index > -1);
    }

    /**
     * Extract file from archive by given fileName (Emulate ZipArchive getFromName())
     *
     * @param        string        $fileName        Filename for the file in zip archive
     * @return        string  $contents        File string contents
     */
    public function getFromName($fileName) 
    {
        $list = $this->_zip->listContent();
        $listCount = count($list);
        $list_index = -1;
        for ($i = 0; $i < $listCount; ++$i) {
            if (strtolower($list[$i]["filename"]) == strtolower($fileName) ||
                strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                $list_index = $i;
                break;
            }
        }

        $extracted = "";
        if ($list_index != -1) {
            $extracted = $this->_zip->extractByIndex($list_index, PCLZIP_OPT_EXTRACT_AS_STRING);
        } else {
            $filename = substr($fileName, 1);
            $list_index = -1;
            for ($i = 0; $i < $listCount; ++$i) {
                if (strtolower($list[$i]["filename"]) == strtolower($fileName) || 
                    strtolower($list[$i]["stored_filename"]) == strtolower($fileName)) {
                    $list_index = $i;
                    break;
                }
            }
            $extracted = $this->_zip->extractByIndex($list_index, PCLZIP_OPT_EXTRACT_AS_STRING);
        }
        if ((is_array($extracted)) && ($extracted != 0)) {
            $contents = $extracted[0]["content"];
        }

        return $contents;
    }
}