Viewing file:  Cleaner.php (2.91 KB) -rw-rw-rw-
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<?php
/**
* File cache cleaner class
*/
if (!defined('ABSPATH')) {
die();
}
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File.php');
/**
* Class W3_Cache_File_Cleaner
*/
class W3_Cache_File_Cleaner {
/**
* Cache directory
*
* @var string
*/
var $_cache_dir = '';
/**
* Clean operation time limit
*
* @var int
*/
var $_clean_timelimit = 0;
/**
* Exclude files
*
* @var array
*/
var $_exclude = array();
/**
* PHP5-style constructor
*
* @param array $config
*/
function __construct($config = array()) {
$this->_cache_dir = (isset($config['cache_dir']) ? trim($config['cache_dir']) : 'cache');
$this->_clean_timelimit = (isset($config['clean_timelimit']) ? (int) $config['clean_timelimit'] : 180);
$this->_exclude = (isset($config['exclude']) ? (array) $config['exclude'] : array());
}
/**
* Run clean operation
*
* @return boolean
*/
function clean() {
@set_time_limit($this->_clean_timelimit);
$this->_clean($this->_cache_dir, false);
}
/**
* Clean
*
* @param string $path
* @param bool $remove
* @return void
*/
function _clean($path, $remove = true) {
$dir = @opendir($path);
if ($dir) {
while (($entry = @readdir($dir)) !== false) {
if ($entry == '.' || $entry == '..') {
continue;
}
foreach ($this->_exclude as $mask) {
if (fnmatch($mask, basename($entry))) {
continue 2;
}
}
$full_path = $path . DIRECTORY_SEPARATOR . $entry;
if (@is_dir($full_path)) {
$this->_clean($full_path);
} elseif (!$this->is_valid($full_path)) {
@unlink($full_path);
}
}
@closedir($dir);
if ($remove) {
@rmdir($path);
}
}
}
/**
* Check if file is valid
*
* @param string $file
* @return bool
*/
function is_valid($file) {
$valid = false;
if (file_exists($file)) {
$ftime = @filemtime($file);
if ($ftime) {
$fp = @fopen($file, 'rb');
if ($fp) {
$expires = @fread($fp, 4);
if ($expires !== false) {
list(, $expire) = @unpack('L', $expires);
$expire = ($expire && $expire <= W3TC_CACHE_FILE_EXPIRE_MAX ? $expire : W3TC_CACHE_FILE_EXPIRE_MAX);
if ($ftime > (time() - $expire)) {
$valid = true;
}
}
@fclose($fp);
}
}
}
return $valid;
}
}
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