hash_hmac

Generate a keyed hash value using the HMAC method

Description

string hash_hmac ( string $algo , string $data , string $key [, bool $raw_output = false ] )

Parameters

algo

Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_algos for a list of supported algorithms.

data

Message to be hashed.

key

Shared secret key used for generating the HMAC variant of the message digest.

raw_output

When set to TRUE, outputs raw binary data. FALSE outputs lowercase hexits.

Return Values

Returns a string containing the calculated message digest as lowercase hexits unless raw_output is set to true in which case the raw binary representation of the message digest is returned. Returns FALSE when algo is unknown.

Changelog

Version Description
7.2.0 Usage of non-cryptographic hash functions (adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat) was disabled.

Examples

Example #1 hash_hmac example

<?php
echo hash_hmac('ripemd160''The quick brown fox jumped over the lazy dog.''secret');
?>

The above example will output:

b8e7ae12510bdfb1812e463a7f086122cf37e4f7

See Also

  • hash
  • hash_algos
  • hash_init
  • hash_hmac_file