(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL hash >= 1.1)
hash_hmac — Generate a keyed hash value using the HMAC method
$algo,$data,$key,$binary = false
algoName of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_hmac_algos() for a list of supported algorithms.
dataMessage to be hashed.
keyShared secret key used for generating the HMAC variant of the message digest.
binary
When set to true, outputs raw binary data.
false outputs lowercase hexits.
Returns a string containing the calculated message digest as lowercase hexits
unless binary is set to true in which case the raw
binary representation of the message digest is returned.
| Version | Description |
|---|---|
| 8.0.0 |
hash_hmac() now throws a ValueError
exception if algo is unknown or is a
non-cryptographic hash function; previously, false was returned instead.
|
| 7.2.0 | Usage of non-cryptographic hash functions (adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat) was disabled. |
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