hash

Generate a hash value (message digest)

Description

string hash(
    string $algo,
    string $data,
    bool $binary = false,
    array $options = []
)

Parameters

algo

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

data

Message to be hashed.

binary

When set to true, outputs raw binary data. false outputs lowercase hexits.

options

An array of options for the various hashing algorithms. Currently, only the "seed" parameter is supported by the MurmurHash variants.

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
8.1.0 The options parameter has been added.
8.0.0 hash now throws a ValueError exception if algo is unknown; previously, false was returned instead.

Examples

Example #1 A hash example

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

The above example will output:

68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483

See Also

  • hash_init
  • hash_file
  • hash_hmac