117 lines
2.0 KiB
PHP
117 lines
2.0 KiB
PHP
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<?php
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namespace W3TC;
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/**
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* File cache cleaner class
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*/
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class Cache_File_Cleaner {
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/**
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* Cache directory
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*
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* @var string
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*/
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var $_cache_dir = '';
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/**
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* Clean operation time limit
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*
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* @var int
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*/
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var $_clean_timelimit = 0;
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/**
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* Exclude files
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*
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* @var array
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*/
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var $_exclude = array();
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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( $config = array() ) {
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$this->_cache_dir = ( isset( $config['cache_dir'] ) ? trim( $config['cache_dir'] ) : 'cache' );
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$this->_clean_timelimit = ( isset( $config['clean_timelimit'] ) ? (int) $config['clean_timelimit'] : 180 );
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$this->_exclude = ( isset( $config['exclude'] ) ? (array) $config['exclude'] : array() );
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}
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/**
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* Run clean operation
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*
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* @return boolean
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*/
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function clean() {
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@set_time_limit( $this->_clean_timelimit );
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$this->_clean( $this->_cache_dir, false );
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}
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/**
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* Clean
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*
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* @param string $path
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* @param bool $remove
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* @return void
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*/
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function _clean( $path, $remove = true ) {
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$dir = @opendir( $path );
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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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foreach ( $this->_exclude as $mask ) {
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if ( fnmatch( $mask, basename( $entry ) ) ) {
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continue 2;
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}
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}
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$full_path = $path . DIRECTORY_SEPARATOR . $entry;
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if ( @is_dir( $full_path ) ) {
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$this->_clean( $full_path );
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} elseif ( !$this->is_valid( $full_path ) ) {
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@unlink( $full_path );
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}
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}
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@closedir( $dir );
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if ( $remove ) {
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@rmdir( $path );
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}
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}
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}
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/**
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* Check 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( $file ) {
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$valid = false;
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if ( file_exists( $file ) ) {
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$fp = @fopen( $file, 'rb' );
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if ( $fp ) {
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$expires = @fread( $fp, 4 );
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if ( $expires !== false ) {
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list( , $expires_at ) = @unpack( 'L', $expires );
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$valid = ( time() < $expires_at );
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}
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@fclose( $fp );
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}
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}
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return $valid;
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}
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}
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