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hash_hmac

(no version information, might be only in CVS)

hash_hmac -- Generate a keyed hash value using the HMAC method

说明

string hash_hmac ( string algo, string data, string key [, bool raw_output] )

参数

algo

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

data

Message to be hashed.

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.

返回值

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.

范例

例 1. hash_hmac() example

<?php
echo hash_hmac('ripemd160', 'The quick brown fox jumped over the lazy dog.', 'secret');
?>

上例将输出：

b8e7ae12510bdfb1812e463a7f086122cf37e4f7

参见

hash()
hash_init()
hash_hmac_file()



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