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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

Descrizione

hash_hmac(
    string $algo,
    string $data,
    #[\SensitiveParameter] string $key,
    bool $binary = false
): string

Elenco dei parametri

algo

Name of selected hashing algorithm (e.g. "sha256"). For a list of supported algorithms see hash_hmac_algos().

Nota:

Non-cryptographic hash functions are not allowed.

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.

Valori restituiti

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.

Errori/Eccezioni

Throws a ValueError exception if algo is unknown or is a non-cryptographic hash function.

Log delle modifiche

Versione Descrizione
8.0.0 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.

Esempi

Example #1 hash_hmac() example

<?php
echo hash_hmac('sha256', 'The quick brown fox jumped over the lazy dog.', 'secret');
?>

Il precedente esempio visualizzerà:

9c5c42422b03f0ee32949920649445e417b2c634050833c5165704b825c2a53b

Vedere anche: