__construct ( $target = 'php://output', string $compression = self::DEFLATE )
__destruct ( )
addFile ( $file, ?string $name = NULL )
addFromStream ( $resource, string $name, int $time = 0 )
addFromString ( string $name, string $data, int $time = 0 )
addRecursive ( $dir, $ignore = '#/(\\.hg(/|$)|\\.hgignore)#' )
close ( )
pushHttpHeaders ( $name )