(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
hash_hmac_file ( string $algo , string $data , string $key [, bool $binary = false ] ) : string|false
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.
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.
| 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
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https://www.php.net/manual/en/function.hash-hmac-file.php