hash_hmac
PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL hash >= 1.1
hash_hmac - Generate a keyed hash value using the HMAC method
hash_hmac(
string$algo,
string$data,
string$key,
[bool$binary = false] ): string
Parameters
- algo
-
Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_hmac_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.
- binary
-
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 binary is set to true in which case the raw binary representation of the message digest is returned.
Changelog
| 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. |