hash_hmac

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)

hash_hmacGenerate a keyed hash value using the HMAC method

Descrição

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

Parâmetros

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.

Valor Retornado

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. Returns false when algo is unknown or is a non-cryptographic hash function.

Changelog

Versão Descrição
7.2.0 Usage of non-cryptographic hash functions (adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat) was disabled.

Exemplos

Exemplo #1 hash_hmac() example

<?php
echo hash_hmac('ripemd160''The quick brown fox jumped over the lazy dog.''secret');
?>

O exemplo acima irá imprimir:

b8e7ae12510bdfb1812e463a7f086122cf37e4f7

Veja Também

  • 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