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.

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