131 lines
2.7 KiB
PHP
131 lines
2.7 KiB
PHP
<?php
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namespace W3TC;
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/**
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* Generic file cache cleaner class
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*/
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class Cache_File_Cleaner_Generic extends Cache_File_Cleaner {
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/**
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* Number of items processed
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*
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* @var integer
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*/
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var $processed_count = 0;
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/**
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* Cache expire time
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*
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* @var int
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*/
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var $_expire = 0;
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private $hard_delete = false;
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/**
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* PHP5-style constructor
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*
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* @param array $config
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*/
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function __construct( $config = array() ) {
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parent::__construct( $config );
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$this->_expire = ( isset( $config['expire'] ) ? (int) $config['expire'] : 0 );
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if ( !$this->_expire || $this->_expire > W3TC_CACHE_FILE_EXPIRE_MAX ) {
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$this->_expire = 0;
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}
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}
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function _clean( $path, $remove = false ) {
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$dir = false;
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if ( is_dir( $path ) ) {
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$dir = @opendir( $path );
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}
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if ( $dir ) {
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while ( ( $entry = @readdir( $dir ) ) !== false ) {
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if ( $entry == '.' || $entry == '..' ) {
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continue;
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}
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$full_path = $path . DIRECTORY_SEPARATOR . $entry;
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if ( substr( $entry, -4 ) === '_old' &&
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!$this->is_old_file_expired( $full_path ) ) {
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continue;
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}
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foreach ( $this->_exclude as $mask ) {
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if ( fnmatch( $mask, basename( $entry ) ) ) {
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continue 2;
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}
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}
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if ( @is_dir( $full_path ) ) {
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$this->_clean( $full_path );
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} else {
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$this->_clean_file( $entry, $full_path );
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}
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}
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@closedir( $dir );
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if ( $this->is_empty_dir( $path ) )
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@rmdir( $path );
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}
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}
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function _clean_file( $entry, $full_path ) {
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if ( substr( $entry, -4 ) === '_old' ) {
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$this->processed_count++;
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@unlink( $full_path );
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} elseif ( !$this->is_valid( $full_path ) ) {
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$old_entry_path = $full_path . '_old';
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$this->processed_count++;
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if ( !@rename( $full_path, $old_entry_path ) ) {
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// if we can delete old entry -
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// do second attempt to store in old-entry file
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if ( @unlink( $old_entry_path ) ) {
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if ( !@rename( $full_path, $old_entry_path ) ) {
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// last attempt - just remove entry
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@unlink( $full_path );
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}
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}
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}
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}
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}
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/**
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* Checks if file is valid
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*
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* @param string $file
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* @return bool
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*/
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function is_valid( $file ) {
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if ( $this->_expire <= 0 )
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return false;
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if ( file_exists( $file ) ) {
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$ftime = @filemtime( $file );
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if ( $ftime && $ftime > ( time() - $this->_expire ) ) {
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return true;
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}
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}
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return false;
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}
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function is_old_file_expired( $file ) {
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$ftime = @filemtime( $file );
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$expire = $this->_expire ? $this->_expire * 5 : W3TC_CACHE_FILE_EXPIRE_MAX;
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if ( $ftime && $ftime < ( time() - $expire ) ) {
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return true;
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}
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return false;
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}
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function is_empty_dir( $dir ) {
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return ( $files = @scandir( $dir ) ) && count( $files ) <= 2;
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}
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}
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