Laracon EU Online 2021

hash_hmac_file

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

hash_hmac_fileGenerate a keyed hash value using the HMAC method and the contents of a given file

Description

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

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

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.

binary

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 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, or if the file data cannot be read.

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

See Also

  • hash_hmac_algos() - Return a list of registered hashing algorithms suitable for hash_hmac
  • hash_hmac() - Generate a keyed hash value using the HMAC method
  • hash_file() - Generate a hash value using the contents of a given file

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top