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hash_hmac_file

(no version information, might be only in CVS)

hash_hmac_file -- Generate a keyed hash value using the HMAC method and the contents of a given file

Description

string hash_hmac_file ( string algo, string filename, string key [, bool raw_output] )

Parameters

algo

Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..)

filename

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.

raw_output

When set to TRUE, outputs raw binary data. Default value (FALSE) outputs lowercase hexits.

Return Values

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.

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()
hash_file()

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