Php/docs/function.hash-hmac-file
hash_hmac_file
(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
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.FALSEoutputs 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
