<?php namespace Aws; /** * Interface that allows implementing various incremental hashes. */ interface HashInterface { /** * Adds data to the hash. * * @param string $data Data to add to the hash */ public function update($data); /** * Finalizes the incremental hash and returns the resulting digest. * * @return string */ public function complete(); /** * Removes all data from the hash, effectively starting a new hash. */ public function reset(); }