(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)
hash_hmac_file — Generate a keyed hash value using the HMAC method and the contents of a given file
$algo
, string $filename
, string $key
[, bool $raw_output = FALSE
] )
algoName of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_hmac_algos() for a list of supported algorithms.
filenameURL describing location of file to be hashed; Supports fopen wrappers.
keyShared 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.
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.
Returns FALSE when algo is unknown or is a
non-cryptographic hash function, or if the file
filename cannot be read.
| Version | Description |
|---|---|
| 7.2.0 | Usage of non-cryptographic hash functions (adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat) was disabled. |
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