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<?php
namespace PhpOffice\PhpSpreadsheet\Shared;
use InvalidArgumentException;
use PhpOffice\PhpSpreadsheet\Exception;
use ZipArchive;
class File
{
/**
* Use Temp or File Upload Temp for temporary files.
*
* @var bool
*/
protected static $useUploadTempDirectory = false;
/**
* Set the flag indicating whether the File Upload Temp directory should be used for temporary files.
*
* @param bool $useUploadTempDir Use File Upload Temporary directory (true or false)
*/
public static function setUseUploadTempDirectory($useUploadTempDir): void
{
self::$useUploadTempDirectory = (bool) $useUploadTempDir;
}
/**
* Get the flag indicating whether the File Upload Temp directory should be used for temporary files.
*
* @return bool Use File Upload Temporary directory (true or false)
*/
public static function getUseUploadTempDirectory()
{
return self::$useUploadTempDirectory;
}
/**
* Verify if a file exists.
*
* @param string $pFilename Filename
*
* @return bool
*/
public static function fileExists($pFilename)
{
// Sick construction, but it seems that
// file_exists returns strange values when
// doing the original file_exists on ZIP archives...
if (strtolower(substr($pFilename, 0, 3)) == 'zip') {
// Open ZIP file and verify if the file exists
$zipFile = substr($pFilename, 6, strpos($pFilename, '#') - 6);
$archiveFile = substr($pFilename, strpos($pFilename, '#') + 1);
$zip = new ZipArchive();
if ($zip->open($zipFile) === true) {
$returnValue = ($zip->getFromName($archiveFile) !== false);
$zip->close();
return $returnValue;
}
return false;
}
return file_exists($pFilename);
}
/**
* Returns canonicalized absolute pathname, also for ZIP archives.
*
* @param string $pFilename
*
* @return string
*/
public static function realpath($pFilename)
{
// Returnvalue
$returnValue = '';
// Try using realpath()
if (file_exists($pFilename)) {
$returnValue = realpath($pFilename);
}
// Found something?
if ($returnValue == '' || ($returnValue === null)) {
$pathArray = explode('/', $pFilename);
while (in_array('..', $pathArray) && $pathArray[0] != '..') {
$iMax = count($pathArray);
for ($i = 0; $i < $iMax; ++$i) {
if ($pathArray[$i] == '..' && $i > 0) {
unset($pathArray[$i], $pathArray[$i - 1]);
break;
}
}
}
$returnValue = implode('/', $pathArray);
}
// Return
return $returnValue;
}
/**
* Get the systems temporary directory.
*
* @return string
*/
public static function sysGetTempDir()
{
if (self::$useUploadTempDirectory) {
// use upload-directory when defined to allow running on environments having very restricted
// open_basedir configs
if (ini_get('upload_tmp_dir') !== false) {
if ($temp = ini_get('upload_tmp_dir')) {
if (file_exists($temp)) {
return realpath($temp);
}
}
}
}
return realpath(sys_get_temp_dir());
}
public static function temporaryFilename(): string
{
$filename = tempnam(self::sysGetTempDir(), 'phpspreadsheet');
if ($filename === false) {
throw new Exception('Could not create temporary file');
}
return $filename;
}
/**
* Assert that given path is an existing file and is readable, otherwise throw exception.
*
* @param string $filename
*/
public static function assertFile($filename): void
{
if (!is_file($filename)) {
throw new InvalidArgumentException('File "' . $filename . '" does not exist.');
}
if (!is_readable($filename)) {
throw new InvalidArgumentException('Could not open "' . $filename . '" for reading.');
}
}
}