archive($filepath)

read_dir($path[, $preserve_filepath = TRUE[, $root_path = NULL]])

clear_data()

add_data($filepath[, $data = NULL])

get_zip()

class CI_Zip $compression_level = 2 The compression level to use. It

download($filename = 'backup.zip')

add_dir($directory)

read_file($path[, $archive_filepath = FALSE])