PHP Manual: Generate a keyed hash value using the HMAC method and the contents of a given file

Description

string hash_hmac_file ( string $algo , string $filename , string $key [, bool $raw_output = false ] )

Parameters

algo: Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_algos for a list of supported algorithms.
filename: URL describing location of file to be hashed; Supports fopen wrappers.
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.

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_file example


<?php
/* Create a file to calculate hash of */
file_put_contents('example.txt', 'The quick brown fox jumped over the lazy dog.');

echo hash_hmac_file('md5', 'example.txt', 'secret');
?>

The above example will output:

7eb2b5c37443418fc77c136dd20e859c

hash_hmac_file

Description

Parameters

Return Values

Changelog

Examples

See Also