Generate a keyed hash value using the HMAC method (original) (raw)
hash_hmac
(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)
hash_hmac — Generate a keyed hash value using the HMAC method
Description
hash_hmac ( string $algo , string $data , string $key [, bool $raw_output = 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.
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 or is a non-cryptographic hash function.
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() - Generate a hash value (message digest)
- hash_hmac_algos() - Return a list of registered hashing algorithms suitable for hash_hmac
- 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