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<?php
/**
* Part of the Joomla Framework Filesystem Package
*
* @copyright Copyright (C) 2005 - 2021 Open Source Matters, Inc. All
rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Filesystem;
use Joomla\Filesystem\Exception\FilesystemException;
/**
* A File handling class
*
* @since 1.0
*/
class File
{
/**
* Gets the extension of a file name
*
* @param string $file The file name
*
* @return string The file extension
*
* @since 3.0.0
*/
public static function getExt($file)
{
// String manipulation should be faster than pathinfo() on newer
PHP versions.
$dot = strrpos($file, '.');
if ($dot === false) {
return '';
}
$ext = substr($file, $dot + 1);
// Extension cannot contain slashes.
if (strpos($ext, '/') !== false || (DIRECTORY_SEPARATOR
=== '\\' && strpos($ext, '\\') !== false)) {
return '';
}
return $ext;
}
/**
* Strips the last extension off of a file name
*
* @param string $file The file name
*
* @return string The file name without the extension
*
* @since 1.0
*/
public static function stripExt($file)
{
return preg_replace('#\.[^.]*$#', '', $file);
}
/**
* Makes the file name safe to use
*
* @param string $file The name of the file [not full path]
* @param array $stripChars Array of regex (by default will remove
any leading periods)
*
* @return string The sanitised string
*
* @since 1.0
*/
public static function makeSafe($file, array $stripChars =
['#^\.#'])
{
// Try transliterating the file name using the native php function
if (function_exists('transliterator_transliterate')
&& function_exists('iconv')) {
// Using iconv to ignore characters that can't be
transliterated
$file = iconv("UTF-8",
"ASCII//TRANSLIT//IGNORE",
transliterator_transliterate('Any-Latin; Latin-ASCII', $file));
}
$regex = array_merge(['#(\.){2,}#',
'#[^A-Za-z0-9\.\_\- ]#'], $stripChars);
$file = preg_replace($regex, '', $file);
// Remove any trailing dots, as those aren't ever valid file
names.
$file = rtrim($file, '.');
return trim($file);
}
/**
* Copies a file
*
* @param string $src The path to the source file
* @param string $dest The path to the destination file
* @param string $path An optional base path to prefix to
the file names
* @param boolean $useStreams True to use streams
*
* @return boolean True on success
*
* @since 1.0
* @throws FilesystemException
* @throws \UnexpectedValueException
*/
public static function copy($src, $dest, $path = null, $useStreams =
false)
{
// Prepend a base path if it exists
if ($path) {
$src = Path::clean($path . '/' . $src);
$dest = Path::clean($path . '/' . $dest);
}
// Check src path
if (!is_readable($src)) {
throw new \UnexpectedValueException(
sprintf(
"%s: Cannot find or read file: %s",
__METHOD__,
Path::removeRoot($src)
)
);
}
if ($useStreams) {
$stream = Stream::getStream();
if (!$stream->copy($src, $dest, null, false)) {
throw new FilesystemException(sprintf('%1$s(%2$s,
%3$s): %4$s', __METHOD__, $src, $dest, $stream->getError()));
}
self::invalidateFileCache($dest);
return true;
}
if (!@ copy($src, $dest)) {
throw new FilesystemException(__METHOD__ . ': Copy
failed.');
}
self::invalidateFileCache($dest);
return true;
}
/**
* Delete a file or array of files
*
* @param mixed $file The file name or an array of file names
*
* @return boolean True on success
*
* @since 1.0
* @throws FilesystemException
*/
public static function delete($file)
{
$files = (array) $file;
foreach ($files as $file) {
$file = Path::clean($file);
$filename = basename($file);
if (!Path::canChmod($file)) {
throw new FilesystemException(__METHOD__ . ': Failed
deleting inaccessible file ' . $filename);
}
// Try making the file writable first. If it's read-only,
it can't be deleted
// on Windows, even if the parent folder is writable
@chmod($file, 0777);
// In case of restricted permissions we zap it one way or the
other
// as long as the owner is either the webserver or the ftp
if (!@ unlink($file)) {
throw new FilesystemException(__METHOD__ . ': Failed
deleting ' . $filename);
}
self::invalidateFileCache($file);
}
return true;
}
/**
* Moves a file
*
* @param string $src The path to the source file
* @param string $dest The path to the destination file
* @param string $path An optional base path to prefix to
the file names
* @param boolean $useStreams True to use streams
*
* @return boolean True on success
*
* @since 1.0
* @throws FilesystemException
*/
public static function move($src, $dest, $path = '',
$useStreams = false)
{
if ($path) {
$src = Path::clean($path . '/' . $src);
$dest = Path::clean($path . '/' . $dest);
}
// Check src path
if (!is_readable($src)) {
return 'Cannot find source file.';
}
if ($useStreams) {
$stream = Stream::getStream();
if (!$stream->move($src, $dest, null, false)) {
throw new FilesystemException(__METHOD__ . ': ' .
$stream->getError());
}
self::invalidateFileCache($dest);
return true;
}
if (!@ rename($src, $dest)) {
throw new FilesystemException(__METHOD__ . ': Rename
failed.');
}
self::invalidateFileCache($dest);
return true;
}
/**
* Write contents to a file
*
* @param string $file The full file path
* @param string $buffer The buffer to write
* @param boolean $useStreams Use streams
* @param boolean $appendToFile Append to the file and not
overwrite it.
*
* @return boolean True on success
*
* @since 1.0
*/
public static function write($file, $buffer, $useStreams = false,
$appendToFile = false)
{
if (\function_exists('set_time_limit'))
{
set_time_limit(ini_get('max_execution_time'));
}
// If the destination directory doesn't exist we need to
create it
if (!file_exists(\dirname($file))) {
Folder::create(\dirname($file));
}
if ($useStreams) {
$stream = Stream::getStream();
// Beef up the chunk size to a meg
$stream->set('chunksize', (1024 * 1024));
$stream->writeFile($file, $buffer, $appendToFile);
self::invalidateFileCache($file);
return true;
}
$file = Path::clean($file);
// Set the required flag to only append to the file and not
overwrite it
if ($appendToFile === true) {
$res = \is_int(file_put_contents($file, $buffer,
\FILE_APPEND));
} else {
$res = \is_int(file_put_contents($file, $buffer));
}
self::invalidateFileCache($file);
return $res;
}
/**
* Moves an uploaded file to a destination folder
*
* @param string $src The name of the php (temporary)
uploaded file
* @param string $dest The path (including filename) to move
the uploaded file to
* @param boolean $useStreams True to use streams
*
* @return boolean True on success
*
* @since 1.0
* @throws FilesystemException
*/
public static function upload($src, $dest, $useStreams = false)
{
// Ensure that the path is valid and clean
$dest = Path::clean($dest);
// Create the destination directory if it does not exist
$baseDir = \dirname($dest);
if (!is_dir($baseDir)) {
Folder::create($baseDir);
}
if ($useStreams) {
$stream = Stream::getStream();
if (!$stream->upload($src, $dest, null, false)) {
throw new FilesystemException(sprintf('%1$s(%2$s,
%3$s): %4$s', __METHOD__, $src, $dest, $stream->getError()));
}
self::invalidateFileCache($dest);
return true;
}
if (is_writable($baseDir) && move_uploaded_file($src,
$dest)) {
// Short circuit to prevent file permission errors
if (Path::setPermissions($dest)) {
self::invalidateFileCache($dest);
return true;
}
throw new FilesystemException(__METHOD__ . ': Failed to
change file permissions.');
}
throw new FilesystemException(__METHOD__ . ': Failed to move
file.');
}
/**
* Invalidate any opcache for a newly written file immediately, if
opcache* functions exist and if this was a PHP file.
*
* @param string $file The path to the file just written to, to
flush from opcache
*
* @return void
*/
public static function invalidateFileCache($file)
{
if (function_exists('opcache_invalidate')) {
$info = pathinfo($file);
if (isset($info['extension']) &&
$info['extension'] === 'php') {
// Force invalidation to be absolutely sure the opcache is
cleared for this file.
opcache_invalidate($file, true);
}
}
}
}