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_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 void
*/
public function clean() {
@set_time_limit( $this->_clean_timelimit );
$this->_clean( $this->_cache_dir, false );
}
/**
* Run clean operation
*
* @return void
*/
public function clean_before() {
@set_time_limit( $this->_clean_timelimit );
$this->_clean( $this->_cache_dir, false );
}
/**
* Clean
*
* @param string $path Path.
* @param bool $remove Remove flag.
*
* @return void
*/
public function _clean( $path, $remove = true ) {
$dir = @opendir( $path );
if ( $dir ) {
$entry = @readdir( $dir );
while ( false !== $entry ) {
if ( '.' === $entry || '..' === $entry ) {
$entry = @readdir( $dir );
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 );
}
$entry = @readdir( $dir );
}
@closedir( $dir );
if ( $remove ) {
@rmdir( $path );
}
}
}
/**
* Check if file is valid
*
* @param string $file File.
*
* @return bool
*/
public function is_valid( $file ) {
$valid = false;
if ( file_exists( $file ) ) {
$fp = @fopen( $file, 'rb' );
if ( $fp ) {
$expires = @fread( $fp, 4 );
if ( false !== $expires ) {
list( , $expires_at ) = @unpack( 'L', $expires );
$valid = ( time() < $expires_at );
}
@fclose( $fp );
}
}
return $valid;
}
}