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extend/phpexcel/PHPExcel/Shared/File.php
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178
extend/phpexcel/PHPExcel/Shared/File.php
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<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2014 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version 1.8.0, 2014-03-02
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*/
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/**
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* PHPExcel_Shared_File
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_Shared_File
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{
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/*
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* Use Temp or File Upload Temp for temporary files
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*
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* @protected
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* @var boolean
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*/
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protected static $_useUploadTempDirectory = FALSE;
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/**
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* Set the flag indicating whether the File Upload Temp directory should be used for temporary files
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*
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* @param boolean $useUploadTempDir Use File Upload Temporary directory (true or false)
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*/
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public static function setUseUploadTempDirectory($useUploadTempDir = FALSE) {
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self::$_useUploadTempDirectory = (boolean) $useUploadTempDir;
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} // function setUseUploadTempDirectory()
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/**
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* Get the flag indicating whether the File Upload Temp directory should be used for temporary files
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*
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* @return boolean Use File Upload Temporary directory (true or false)
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*/
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public static function getUseUploadTempDirectory() {
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return self::$_useUploadTempDirectory;
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} // function getUseUploadTempDirectory()
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/**
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* Verify if a file exists
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*
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* @param string $pFilename Filename
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* @return bool
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*/
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public static function file_exists($pFilename) {
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// Sick construction, but it seems that
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// file_exists returns strange values when
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// doing the original file_exists on ZIP archives...
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if ( strtolower(substr($pFilename, 0, 3)) == 'zip' ) {
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// Open ZIP file and verify if the file exists
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$zipFile = substr($pFilename, 6, strpos($pFilename, '#') - 6);
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$archiveFile = substr($pFilename, strpos($pFilename, '#') + 1);
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$zip = new ZipArchive();
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if ($zip->open($zipFile) === true) {
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$returnValue = ($zip->getFromName($archiveFile) !== false);
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$zip->close();
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return $returnValue;
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} else {
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return false;
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}
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} else {
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// Regular file_exists
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return file_exists($pFilename);
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}
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}
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/**
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* Returns canonicalized absolute pathname, also for ZIP archives
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*
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* @param string $pFilename
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* @return string
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*/
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public static function realpath($pFilename) {
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// Returnvalue
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$returnValue = '';
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// Try using realpath()
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if (file_exists($pFilename)) {
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$returnValue = realpath($pFilename);
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}
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// Found something?
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if ($returnValue == '' || ($returnValue === NULL)) {
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$pathArray = explode('/' , $pFilename);
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while(in_array('..', $pathArray) && $pathArray[0] != '..') {
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for ($i = 0; $i < count($pathArray); ++$i) {
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if ($pathArray[$i] == '..' && $i > 0) {
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unset($pathArray[$i]);
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unset($pathArray[$i - 1]);
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break;
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}
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}
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}
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$returnValue = implode('/', $pathArray);
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}
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// Return
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return $returnValue;
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}
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/**
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* Get the systems temporary directory.
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*
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* @return string
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*/
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public static function sys_get_temp_dir()
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{
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if (self::$_useUploadTempDirectory) {
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// use upload-directory when defined to allow running on environments having very restricted
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// open_basedir configs
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if (ini_get('upload_tmp_dir') !== FALSE) {
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if ($temp = ini_get('upload_tmp_dir')) {
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if (file_exists($temp))
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return realpath($temp);
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}
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}
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}
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// sys_get_temp_dir is only available since PHP 5.2.1
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// http://php.net/manual/en/function.sys-get-temp-dir.php#94119
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if ( !function_exists('sys_get_temp_dir')) {
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if ($temp = getenv('TMP') ) {
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if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
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}
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if ($temp = getenv('TEMP') ) {
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if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
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}
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if ($temp = getenv('TMPDIR') ) {
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if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
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}
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// trick for creating a file in system's temporary dir
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// without knowing the path of the system's temporary dir
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$temp = tempnam(__FILE__, '');
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if (file_exists($temp)) {
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unlink($temp);
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return realpath(dirname($temp));
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}
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return null;
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}
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// use ordinary built-in PHP function
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// There should be no problem with the 5.2.4 Suhosin realpath() bug, because this line should only
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// be called if we're running 5.2.1 or earlier
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return realpath(sys_get_temp_dir());
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}
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}
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