visualizer / vendor / phpoffice / phpexcel / Classes / PHPExcel / Shared / File.php

File.php in Visualizer – Tables & Charts Manager with Built-in AI Generator 3.0.3, at vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/File.php

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1	<?php
2	/**
3	* PHPExcel
4	*
5	* Copyright (c) 2006 - 2014 PHPExcel
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*
21	* @category PHPExcel
22	* @package PHPExcel_Shared
23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25	* @version ##VERSION##, ##DATE##
26	*/
27
28
29	/**
30	* PHPExcel_Shared_File
31	*
32	* @category PHPExcel
33	* @package PHPExcel_Shared
34	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35	*/
36	class PHPExcel_Shared_File
37	{
38	/*
39	* Use Temp or File Upload Temp for temporary files
40	*
41	* @protected
42	* @var boolean
43	*/
44	protected static $_useUploadTempDirectory = FALSE;
45
46
47	/**
48	* Set the flag indicating whether the File Upload Temp directory should be used for temporary files
49	*
50	* @param boolean $useUploadTempDir Use File Upload Temporary directory (true or false)
51	*/
52	public static function setUseUploadTempDirectory($useUploadTempDir = FALSE) {
53	self::$_useUploadTempDirectory = (boolean) $useUploadTempDir;
54	} // function setUseUploadTempDirectory()
55
56
57	/**
58	* Get the flag indicating whether the File Upload Temp directory should be used for temporary files
59	*
60	* @return boolean Use File Upload Temporary directory (true or false)
61	*/
62	public static function getUseUploadTempDirectory() {
63	return self::$_useUploadTempDirectory;
64	} // function getUseUploadTempDirectory()
65
66
67	/**
68	* Verify if a file exists
69	*
70	* @param string $pFilename Filename
71	* @return bool
72	*/
73	public static function file_exists($pFilename) {
74	// Sick construction, but it seems that
75	// file_exists returns strange values when
76	// doing the original file_exists on ZIP archives...
77	if ( strtolower(substr($pFilename, 0, 3)) == 'zip' ) {
78	// Open ZIP file and verify if the file exists
79	$zipFile = substr($pFilename, 6, strpos($pFilename, '#') - 6);
80	$archiveFile = substr($pFilename, strpos($pFilename, '#') + 1);
81
82	$zip = new ZipArchive();
83	if ($zip->open($zipFile) === true) {
84	$returnValue = ($zip->getFromName($archiveFile) !== false);
85	$zip->close();
86	return $returnValue;
87	} else {
88	return false;
89	}
90	} else {
91	// Regular file_exists
92	return file_exists($pFilename);
93	}
94	}
95
96	/**
97	* Returns canonicalized absolute pathname, also for ZIP archives
98	*
99	* @param string $pFilename
100	* @return string
101	*/
102	public static function realpath($pFilename) {
103	// Returnvalue
104	$returnValue = '';
105
106	// Try using realpath()
107	if (file_exists($pFilename)) {
108	$returnValue = realpath($pFilename);
109	}
110
111	// Found something?
112	if ($returnValue == '' \|\| ($returnValue === NULL)) {
113	$pathArray = explode('/' , $pFilename);
114	while(in_array('..', $pathArray) && $pathArray[0] != '..') {
115	for ($i = 0; $i < count($pathArray); ++$i) {
116	if ($pathArray[$i] == '..' && $i > 0) {
117	unset($pathArray[$i]);
118	unset($pathArray[$i - 1]);
119	break;
120	}
121	}
122	}
123	$returnValue = implode('/', $pathArray);
124	}
125
126	// Return
127	return $returnValue;
128	}
129
130	/**
131	* Get the systems temporary directory.
132	*
133	* @return string
134	*/
135	public static function sys_get_temp_dir()
136	{
137	if (self::$_useUploadTempDirectory) {
138	// use upload-directory when defined to allow running on environments having very restricted
139	// open_basedir configs
140	if (ini_get('upload_tmp_dir') !== FALSE) {
141	if ($temp = ini_get('upload_tmp_dir')) {
142	if (file_exists($temp))
143	return realpath($temp);
144	}
145	}
146	}
147
148	// sys_get_temp_dir is only available since PHP 5.2.1
149	// http://php.net/manual/en/function.sys-get-temp-dir.php#94119
150	if ( !function_exists('sys_get_temp_dir')) {
151	if ($temp = getenv('TMP') ) {
152	if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
153	}
154	if ($temp = getenv('TEMP') ) {
155	if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
156	}
157	if ($temp = getenv('TMPDIR') ) {
158	if ((!empty($temp)) && (file_exists($temp))) { return realpath($temp); }
159	}
160
161	// trick for creating a file in system's temporary dir
162	// without knowing the path of the system's temporary dir
163	$temp = tempnam(__FILE__, '');
164	if (file_exists($temp)) {
165	unlink($temp);
166	return realpath(dirname($temp));
167	}
168
169	return null;
170	}
171
172	// use ordinary built-in PHP function
173	// There should be no problem with the 5.2.4 Suhosin realpath() bug, because this line should only
174	// be called if we're running 5.2.1 or earlier
175	return realpath(sys_get_temp_dir());
176	}
177
178	}
179