-<?php

-/**

-*

-* @package acm

-* @version $Id$

-* @copyright (c) 2005 phpBB Group

-* @license http://opensource.org/licenses/gpl-license.php GNU Public License

-*

-*/

-

-/**

-* @ignore

-*/

-if (!defined('IN_PHPBB'))

-{

- exit;

-}

-

-/**

-* Define file-based cache.

-* @package acm

-*/

-class phpbb_acm_file extends phpbb_acm_abstract

-{

- /**

- * @var string The cache directory to use

- */

- public $cache_dir = '';

-

- /**

- * @var array|bool The cache types this class supports. True indicates support for all types.

- */

- public $supported = true;

-

- /**

- * Set cache directory

- *

- * @param string $cache_prefix The cache prefix the instance is responsible for

- * @access public

- */

- public function __construct($cache_prefix)

- {

- $this->cache_dir = PHPBB_ROOT_PATH . 'cache/';

- $this->cache_prefix = $cache_prefix;

- }

-

- /**

- * {@link phpbb_acm_abstract::get() get()}

- */

- public function get($var_name)

- {

- if ($var_name[0] === '#')

- {

- $var_name = substr($var_name, 1);

- return $this->get_global($var_name);

- }

-

- if (!$this->exists($var_name))

- {

- return false;

- }

-

- @include($this->cache_dir . $this->cache_prefix . '_' . $var_name . '.' . PHP_EXT);

-

- // If no data there, then the file expired...

- if ($expired)

- {

- // Destroy

- $this->destroy($var_name);

- return false;

- }

-

- return $data;

- }

-

- /**

- * {@link phpbb_acm_abstract::put() put()}

- */

- public function put($var_name, $data, $ttl = 31536000)

- {

- if ($var_name[0] === '#')

- {

- $var_name = substr($var_name, 1);

- return $this->put_global($var_name, $data, $ttl);

- }

-

- $filename = $this->cache_dir . $this->cache_prefix . '_' . $var_name . '.' . PHP_EXT;

-

- if ($fp = @fopen($filename, 'wb'))

- {

- @flock($fp, LOCK_EX);

- fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$expired = (time() > " . (time() + $ttl) . ") ? true : false;\nif (\$expired) { return; }\n\$data = " . (sizeof($data) ? "unserialize(" . var_export(serialize($data), true) . ");" : 'array();'));

- @flock($fp, LOCK_UN);

- fclose($fp);

-

- phpbb::$system->chmod($filename, phpbb::CHMOD_READ | phpbb::CHMOD_WRITE);

- }

-

- return $data;

- }

-

-

- /**

- * {@link phpbb_acm_abstract::exists() exists()}

- */

- public function exists($var_name)

- {

- if ($var_name[0] === '#')

- {

- $var_name = substr($var_name, 1);

- return $this->exists_global($var_name);

- }

-

- return file_exists($this->cache_dir . $this->cache_prefix . '_' . $var_name . '.' . PHP_EXT);

- }

-

- /**

- * {@link phpbb_acm_abstract::destroy() destroy()}

- */

- public function destroy($var_name)

- {

- if ($var_name[0] === '#')

- {

- $var_name = substr($var_name, 1);

- $this->destroy_global($var_name);

- }

-

- if (!$this->exists($var_name))

- {

- return false;

- }

-

- $this->remove_file($this->cache_dir . $this->cache_prefix . '_' . $var_name . '.' . PHP_EXT, true);

- }

-

- /**

- * {@link phpbb_acm_abstract::load() load()}

- */

- public function load()

- {

- // grab the global cache

- if (file_exists($this->cache_dir . $this->cache_prefix . '_global.' . PHP_EXT))

- {

- @include($this->cache_dir . $this->cache_prefix . '_global.' . PHP_EXT);

- return true;

- }

-

- return false;

- }

-

- /**

- * {@link phpbb_acm_abstract::unload() unload()}

- */

- public function unload()

- {

- if (!$this->is_modified)

- {

- return;

- }

-

- $filename = $this->cache_dir . $this->cache_prefix . '_global.' . PHP_EXT;

-

- if ($fp = @fopen($filename, 'wb'))

- {

- @flock($fp, LOCK_EX);

- fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$this->vars = unserialize(" . var_export(serialize($this->vars), true) . ");\n\$this->var_expires = unserialize(" . var_export(serialize($this->var_expires), true) . ");");

- @flock($fp, LOCK_UN);

- fclose($fp);

-

- phpbb::$system->chmod($filename, phpbb::CHMOD_READ | phpbb::CHMOD_WRITE);

- }

- else

- {

- // Now, this occurred how often? ... phew, just tell the user then...

- if (!@is_writable($this->cache_dir))

- {

- // We need to use die() here, because else we may encounter an infinite loop (the message handler calls $cache->unload())

- die($this->cache_dir . ' is NOT writable.');

- exit;

- }

-

- die('Not able to open ' . $filename);

- exit;

- }

-

- $this->is_modified = false;

-

- // To reset the global vars

- $this->vars = $this->var_expires = array();

- }

-

- /**

- * Tidy local cache data. Also see {@link phpbb_acm_abstract::tidy() tidy()}

- * @access protected

- */

- protected function tidy_local()

- {

- $dir = @opendir($this->cache_dir);

-

- if (!$dir)

- {

- return;

- }

-

- while (($entry = readdir($dir)) !== false)

- {

- if (strpos($entry, $this->cache_prefix . '_') !== 0 || strpos($entry, $this->cache_prefix . '_global') === 0)

- {

- continue;

- }

-

- $expired = true;

- @include($this->cache_dir . $entry);

-

- if ($expired)

- {

- $this->remove_file($this->cache_dir . $entry);

- }

- }

- closedir($dir);

- }

-

- /**

- * Purge local cache data. Also see {@link phpbb_acm_abstract::purge() purge()}

- * @access protected

- */

- protected function purge_local()

- {

- $dir = @opendir($this->cache_dir);

-

- if (!$dir)

- {

- return;

- }

-

- while (($entry = readdir($dir)) !== false)

- {

- if (strpos($entry, $this->cache_prefix . '_') !== 0 || strpos($entry, $this->cache_prefix . '_global') === 0)

- {

- continue;

- }

-

- $this->remove_file($this->cache_dir . $entry);

- }

- closedir($dir);

- }

-

- /**

- * Get modified date for cache entry

- *

- * @param string $var_name The cache variable name

- * @access public

- */

- public function get_modified_date($var_name)

- {

- return @filemtime($this->cache_dir . $this->cache_prefix . '_' . $var_name . '.' . PHP_EXT);

- }

-

- /**

- * Removes/unlinks file

- *

- * @param string $filename The filename to remove

- * @param bool $check If true the cache directory is checked for correct directory permissions.

- * @access protected

- */

- protected function remove_file($filename, $check = false)

- {

- if ($check && !@is_writable($this->cache_dir))

- {

- // E_USER_ERROR - not using language entry - intended.

- trigger_error('Unable to remove files within ' . $this->cache_dir . '. Please check directory permissions.', E_USER_ERROR);

- }

-

- return @unlink($filename);

- }

-}

-

-/**

-* Special implementation for cache type 'sql'

-* @package acm

-*/

-class phpbb_acm_file_sql extends phpbb_acm_file

-{

- /**

- * {@link phpbb_acm_abstract::destroy() destroy()}

- */

- public function destroy($var_name)

- {

- if ($var_name[0] === '#')

- {

- $var_name = substr($var_name, 1);

- $this->destroy_global($var_name);

- }

-

- $table = (!is_array($var_name)) ? array($var_name) : $var_name;

- $dir = @opendir($this->cache_dir);

-

- if (!$dir)

- {

- return;

- }

-

- while (($entry = readdir($dir)) !== false)

- {

- if (strpos($entry, $this->cache_prefix . '_') !== 0)

- {

- continue;

- }

-

- // The following method is more failproof than simply assuming the query is on line 3 (which it should be)

- @include($this->cache_dir . $entry);

-

- if (empty($data))

- {

- $this->remove_file($this->cache_dir . $entry);

- continue;

- }

-

- // Get the query

- $data = $data['query'];

-

- $found = false;

- foreach ($table as $check_table)

- {

- // Better catch partial table names than no table names. ;)

- if (strpos($data, $check_table) !== false)

- {

- $found = true;

- break;

- }

- }

-

- if ($found)

- {

- $this->remove_file($this->cache_dir . $entry);

- }

- }

- closedir($dir);

-

- return;

- }

-}

-

-?> \ No newline at end of file