Squashed one last typo.
+ − <?php
+ −
+ − /*
+ − * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
+ − * Version 1.1.5 (Caoineag alpha 5)
+ − * Copyright (C) 2006-2008 Dan Fuhry
+ − *
+ − * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
+ − * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+ − *
+ − * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ − * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ − */
+ −
+ − /**
+ − * Framework for caching arbitrary data around the site.
+ − * @package Enano
+ − * @subpackage Core
+ − * @author Dan Fuhry <dan@enanocms.org>
+ − * @license GNU General Public License
+ − */
+ −
+ − class CacheManager
+ − {
+ − /**
+ − * Fetch a cached piece of data.
+ − * @param string Cache ID. The timestamp is checked automatically.
+ − */
+ −
+ − public function fetch($cache_id)
+ − {
+ − if ( !preg_match('/^[a-z0-9_]+$/', $cache_id) )
+ − {
+ − throw new Exception('Cache ID must be letters, numbers, and underscores.');
+ − }
+ − $cache_file = ENANO_ROOT . "/cache/cache_$cache_id.php";
+ − if ( file_exists($cache_file) )
+ − {
+ − require($cache_file);
+ − if ( isset($_cache_data) && isset($_cache_ttl) && isset($_cache_timestamp) )
+ − {
+ − $cache_expire = $_cache_timestamp + ( 60 * $_cache_ttl);
+ − if ( $cache_expire >= time() || $_cache_ttl === -1 )
+ − {
+ − return $_cache_data;
+ − }
+ − }
+ − }
+ − return false;
+ − }
+ −
+ − /**
+ − * Stores an array by var_export()ing it and saving it to disk.
+ − * @param string Cache ID - human readable name for this store (letters, numbers, underscores)
+ − * @param array Data to store
+ − * @param int TTL for the cached array, in minutes. Defaults to 20. If set to -1, caches indefinitely.
+ − * @return bool True on success, false on failure
+ − */
+ −
+ − public function store($cache_id, $data, $ttl = 20)
+ − {
+ − if ( getConfig('cache_thumbs') != '1' )
+ − {
+ − // caching disabled
+ − return false;
+ − }
+ − if ( !preg_match('/^[a-z0-9_]+$/', $cache_id) )
+ − {
+ − throw new Exception('Cache ID must be letters, numbers, and underscores.');
+ − }
+ − if ( !is_int($ttl) )
+ − {
+ − throw new Exception('TTL must be an integer');
+ − }
+ −
+ − $cache_file = ENANO_ROOT . "/cache/cache_$cache_id.php";
+ − if ( file_exists($cache_file) )
+ − {
+ − @unlink($cache_file);
+ − }
+ − $fh = @fopen($cache_file, 'w');
+ − if ( !$fh )
+ − {
+ − throw new Exception('Failed to open file for writing.');
+ − }
+ − $exported = Language::var_export_string($data);
+ − $now = time();
+ − $content = <<<EOF
+ − <?php
+ − /**
+ − * Automatically generated cache file.
+ − * Do not edit this file as it will expire and be overwritten $ttl minutes from its creation.
+ − */
+ −
+ − \$_cache_ttl = $ttl;
+ − \$_cache_timestamp = $now;
+ − \$_cache_data = $exported;
+ −
+ − EOF;
+ − fwrite($fh, $content);
+ − fclose($fh);
+ −
+ − return true;
+ − }
+ −
+ − /**
+ − * Deletes a cached item.
+ − * @param string Cache ID.
+ − * @return bool true on success or if item doesn't exist, false on failure
+ − */
+ −
+ − public function purge($cache_id)
+ − {
+ − if ( !preg_match('/^[a-z0-9_]+$/', $cache_id) )
+ − {
+ − throw new Exception('Cache ID must be letters, numbers, and underscores.');
+ − }
+ −
+ − $cache_file = ENANO_ROOT . "/cache/cache_$cache_id.php";
+ − if ( file_exists($cache_file) )
+ − {
+ − if ( unlink($cache_file) )
+ − {
+ − return true;
+ − }
+ − return false;
+ − }
+ − return true;
+ − }
+ − }
+ −