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<?php
/**
* Generic file cache cleaner class
*/
if (!defined('ABSPATH')) {
die();
}
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File/Cleaner.php');
/**
* Class W3_Cache_File_Cleaner_Generic
*/
class W3_Cache_File_Cleaner_Generic extends W3_Cache_File_Cleaner {
/**
* Number of items processed
*
* @var integer
*/
var $processed_count = 0;
/**
* Cache expire time
*
* @var int
*/
var $_expire = 0;
/**
* PHP5-style constructor
*
* @param array $config
*/
function __construct($config = array()) {
parent::__construct($config);
$this->_expire = (isset($config['expire']) ? (int) $config['expire'] : 0);
if (!$this->_expire || $this->_expire > W3TC_CACHE_FILE_EXPIRE_MAX) {
$this->_expire = 0;
}
}
function _clean($path, $remove = false) {
$dir = false;
if (is_dir($path)) {
$dir = @opendir($path);
}
if ($dir) {
while (($entry = @readdir($dir)) !== false) {
if ($entry == '.' || $entry == '..') {
continue;
}
$full_path = $path . DIRECTORY_SEPARATOR . $entry;
if (substr($entry, -4) === '.old' && !$this->is_old_file_expired($full_path)) {
continue;
}
foreach ($this->_exclude as $mask) {
if (fnmatch($mask, basename($entry))) {
continue 2;
}
}
if (@is_dir($full_path)) {
$this->_clean($full_path);
} elseif (substr($entry, -4) === '.old') {
$this->processed_count++;
@unlink($full_path);
} elseif (!$this->is_valid($full_path)) {
$old_entry_path = $full_path . '.old';
$this->processed_count++;
if (!@rename($full_path, $old_entry_path)) {
// if we can delete old entry - do second attempt to store in old-entry file
if (@unlink($old_entry_path)) {
@rename($full_path, $old_entry_path);
}
}
}
}
@closedir($dir);
if ($this->is_empty_dir($path))
@rmdir($path);
}
}
/**
* Checks if file is valid
*
* @param string $file
* @return bool
*/
function is_valid($file) {
if ($this->_expire <= 0)
return false;
if (file_exists($file)) {
$ftime = @filemtime($file);
if ($ftime && $ftime > (time() - $this->_expire)) {
return true;
}
}
return false;
}
function is_old_file_expired($file) {
$ftime = @filemtime($file);
$expire = $this->_expire ? $this->_expire * 5 : W3TC_CACHE_FILE_EXPIRE_MAX;
if ($ftime && $ftime < (time() - $expire)) {
return true;
}
return false;
}
function is_empty_dir($dir){
return (($files = @scandir($dir)) && count($files) <= 2);
}
}
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