--- /dev/null
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Implements a cache on the filesystem.
+ *
+ * @author Andrew Tch <andrew@noop.lv>
+ */
+class Twig_Cache_Filesystem implements Twig_CacheInterface
+{
+ const FORCE_BYTECODE_INVALIDATION = 1;
+
+ private $directory;
+ private $options;
+
+ /**
+ * @param $directory string The root cache directory
+ * @param $options int A set of options
+ */
+ public function __construct($directory, $options = 0)
+ {
+ $this->directory = rtrim($directory, '\/').'/';
+ $this->options = $options;
+ }
+
+ public function generateKey($name, $className)
+ {
+ $hash = hash('sha256', $className);
+
+ return $this->directory.$hash[0].$hash[1].'/'.$hash.'.php';
+ }
+
+ public function load($key)
+ {
+ if (file_exists($key)) {
+ @include_once $key;
+ }
+ }
+
+ public function write($key, $content)
+ {
+ $dir = dirname($key);
+ if (!is_dir($dir)) {
+ if (false === @mkdir($dir, 0777, true)) {
+ if (PHP_VERSION_ID >= 50300) {
+ clearstatcache(true, $dir);
+ }
+ if (!is_dir($dir)) {
+ throw new RuntimeException(sprintf('Unable to create the cache directory (%s).', $dir));
+ }
+ }
+ } elseif (!is_writable($dir)) {
+ throw new RuntimeException(sprintf('Unable to write in the cache directory (%s).', $dir));
+ }
+
+ $tmpFile = tempnam($dir, basename($key));
+ if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $key)) {
+ @chmod($key, 0666 & ~umask());
+
+ if (self::FORCE_BYTECODE_INVALIDATION == ($this->options & self::FORCE_BYTECODE_INVALIDATION)) {
+ // Compile cached file into bytecode cache
+ if (function_exists('opcache_invalidate')) {
+ opcache_invalidate($key, true);
+ } elseif (function_exists('apc_compile_file')) {
+ apc_compile_file($key);
+ }
+ }
+
+ return;
+ }
+
+ throw new RuntimeException(sprintf('Failed to write cache file "%s".', $key));
+ }
+
+ public function getTimestamp($key)
+ {
+ if (!file_exists($key)) {
+ return 0;
+ }
+
+ return (int) @filemtime($key);
+ }
+}