hash_hmac
(PHP 5 >= 5.1.2, PECL hash >= 1.1)
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.FALSEoutputs 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() - Generate a hash value (message digest)
- hash_algos() - Return a list of registered hashing algorithms
- hash_init() - Initialize an incremental hashing context
- hash_hmac_file() - Generate a keyed hash value using the HMAC method and the contents of a given file
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