PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL hash >= 1.1
hash_hmac_file - Generate a keyed hash value using the HMAC method and the contents of a given file
Code Examples

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



Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..) See hash_hmac_algos for a list of supported algorithms.


URL describing location of file to be hashed; Supports fopen wrappers.


Shared secret key used for generating the HMAC variant of the message digest.


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 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.

Related Functions

Example of hash_hmac_file

Show all examples for hash_hmac_file

PHP Version:

Function hash_hmac_file:

HASH Message Digest Framework Functions

Most used PHP functions