hash_hmac_file
Description
The hash_hmac_file of Hash for PHP generate a keyed hash value using the HMAC method and the contents of a given file.
Syntax
hash_hmac_file( string $algo, string $filename, string $key, bool $binary = false ): string|false
Parameters
algo
Name of selected hashing algorithm.
filename
The filename of the file to hash.
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
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 if the file filename cannot be read.
Examples
1 · algo filename key
<? $algo = "sha384"; $filename = $_SERVER['DOCUMENT_ROOT'] . "/assets/txt/1.txt"; $key = "mykey"; $return = hash_hmac_file($algo, $filename, $key); echo $return;
ddb98e935cd504163634899e3b743724a87b2aafe4fe25594748b8fbdc1dadfafbd74cb48b0efc755cb01044277c45e7
2 · binary
<? $algo = "sha384"; $filename = $_SERVER['DOCUMENT_ROOT'] . "/assets/txt/1.txt"; $key = "mykey"; $binary = true; $return = hash_hmac_file($algo, $filename, $key, $binary); echo $return . PHP_EOL . bin2hex($return);
ݹ��\�64��;t7$�{*��%YGH�������L���u\�D'|E� ddb98e935cd504163634899e3b743724a87b2aafe4fe25594748b8fbdc1dadfafbd74cb48b0efc755cb01044277c45e7