PHP implementation of the enhanced Mhash function, PHP implementation mhash function _php Tutorial

PHP implementation of the enhanced Mhash function, PHP implementation Mhash function

Today, using PHP's cryptographic function Mhash, error: Fatal error:call to undefined function mhash ()

Mhash is a built-in function for PHP but uses an error.

Some studies summarize two methods:

1, Import php_mhash.dll extension file, in addition to import Libmhash.dll (Mhash library load dependent on this file),

Load LoadFile C:/php/libmhash.dll "in the Apache configuration file httpd.conf.

2, use the custom Mhash enhancement function.
Copy the Code code as follows:
function Hmac_md5 ($key, $data)
{
if (extension_loaded (' Mhash '))
{
Return Bin2Hex (Mhash (MHASH_MD5, $data, $key));
}

$b = 64;
if (strlen ($key) > $b)
{
$key = Pack (' h* ', MD5 ($key));
}
$key = Str_pad ($key, $b, Chr (0x00));
$ipad = Str_pad (", $b, Chr (0x36));
$opad = Str_pad (", $b, Chr (0x5c));

$k _ipad = $key ^ $ipad;
$k _opad = $key ^ $opad;

return MD5 ($k _opad. Pack (' h* ', MD5 ($k _ipad. $data)));
}

The parameters $key and $data in the HMAC_MD5 function correspond to mhash original 3,2 parameters.

Both of these methods can be used successfully on the PHP mhash encryption function

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