mhashDescriptionmhash() encodes information contained in data using the algorithm specified by the hash parameter. It's possible to obtain a list of supported hashes by using a combination of mhash_count() and mhash_get_hash_name() . For details, see the example in mhash_count() . If the optional key parameter is used, the HMAC for the data is returned. HMAC is an acronym of Hashing for Message AuthentiCation. For more information on HMAC, see RFC 2104. Essentially, HMAC allows cryptographic functions to be used with a secret key, allowing for calculation and verification of a cryptographic hash.
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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