[UFFENO1]

In common.php do this:

/*
function hex2bin ($input, $assume_safe=true)
{
    if ($assume_safe !== true && ! ((strlen($input) % 2) === 0 || preg_match ('/^[0-9a-f]+$/i', $input)))
        return "";
    return pack('H*', $input );
}
*/