public static function writeFile($_filepath, $_contents, Brainy $smarty)
{
if ($smarty->_file_perms !== null) {
$old_umask = umask(0);
}
$_dirpath = dirname($_filepath);
// if subdirs, create dir structure
if ($_dirpath !== '.' && !file_exists($_dirpath)) {
mkdir($_dirpath, $smarty->_dir_perms === null ? 0777 : $smarty->_dir_perms, true);
}
// write to tmp file, then move to overt file lock race condition
$_tmp_file = $_dirpath . DIRECTORY_SEPARATOR . str_replace(array('.', ','), '_', uniqid('wrt', true));
if (!file_put_contents($_tmp_file, $_contents)) {
throw new SmartyException("unable to write file {$_tmp_file}");
}
/*
* Windows' rename() fails if the destination exists,
* Linux' rename() properly handles the overwrite.
* Simply unlink()ing a file might cause other processes
* currently reading that file to fail, but linux' rename()
* seems to be smart enough to handle that for us.
*/
try {
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
// remove original file
if (file_exists($_filepath)) {
unlink($_filepath);
}
// rename tmp file
$success = rename($_tmp_file, $_filepath);
} else {
// rename tmp file
$success = rename($_tmp_file, $_filepath);
if (!$success) {
// remove original file
unlink($_filepath);
// rename tmp file
$success = rename($_tmp_file, $_filepath);
}
}
} catch (Exception $e) {
$success = false;
}
if (!$success) {
throw new SmartyException("unable to write file {$_filepath}");
}
if ($smarty->_file_perms !== null) {
// set file permissions
chmod($_filepath, $smarty->_file_perms);
umask($old_umask);
}
return true;
}
