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<?php
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/**
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* Smarty write file plugin
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*
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* @package Smarty
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* @subpackage PluginsInternal
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* @author Monte Ohrt
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*/
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/**
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* Smarty Internal Write File Class
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*
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* @package Smarty
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* @subpackage PluginsInternal
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*/
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class Smarty_Internal_Runtime_WriteFile
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{
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/**
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* Writes file in a safe way to disk
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*
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* @param string $_filepath complete filepath
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* @param string $_contents file content
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* @param Smarty $smarty smarty instance
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*
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* @throws SmartyException
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* @return boolean true
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*/
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public function writeFile($_filepath, $_contents, Smarty $smarty)
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{
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$_error_reporting = error_reporting();
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error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);
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$_dirpath = dirname($_filepath);
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// if subdirs, create dir structure
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if ($_dirpath !== '.') {
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$i = 0;
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// loop if concurrency problem occurs
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// see https://bugs.php.net/bug.php?id=35326
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while (!is_dir($_dirpath)) {
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if (@mkdir($_dirpath, 0777, true)) {
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break;
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}
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clearstatcache();
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if (++$i === 3) {
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error_reporting($_error_reporting);
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throw new SmartyException("unable to create directory {$_dirpath}");
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}
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sleep(1);
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}
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}
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// write to tmp file, then move to overt file lock race condition
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$_tmp_file = $_dirpath . DIRECTORY_SEPARATOR . str_replace(array('.', ','), '_', uniqid('wrt', true));
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if (!file_put_contents($_tmp_file, $_contents)) {
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error_reporting($_error_reporting);
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throw new SmartyException("unable to write file {$_tmp_file}");
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}
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/*
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* Windows' rename() fails if the destination exists,
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* Linux' rename() properly handles the overwrite.
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* Simply unlink()ing a file might cause other processes
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* currently reading that file to fail, but linux' rename()
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* seems to be smart enough to handle that for us.
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*/
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if (Smarty::$_IS_WINDOWS) {
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// remove original file
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if (is_file($_filepath)) {
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@unlink($_filepath);
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}
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// rename tmp file
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$success = @rename($_tmp_file, $_filepath);
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} else {
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// rename tmp file
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$success = @rename($_tmp_file, $_filepath);
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if (!$success) {
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// remove original file
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if (is_file($_filepath)) {
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@unlink($_filepath);
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}
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// rename tmp file
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$success = @rename($_tmp_file, $_filepath);
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}
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}
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if (!$success) {
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error_reporting($_error_reporting);
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throw new SmartyException("unable to write file {$_filepath}");
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}
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// set file permissions
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@chmod($_filepath, 0666 & ~umask());
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error_reporting($_error_reporting);
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return true;
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}
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}
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