Mysql PASSWORD(), olo_password() PHP 함수

function mysqlPassword($pw) {

   //SELECT CONCAT('*', UPPER(SHA1(UNHEX(SHA1('$pw'))))); //sql 이용

    return '*'.strtoupper(sha1(sha1($pw, true)));    

}

function old_password($password) {

    if ($password == '')

        return '';

    $nr = 1345345333;

    $add = 7;

    $nr2 = 0x12345671;

    foreach(str_split($password) as $c) {

        if ($c == ' ' or $c == "\t")

            continue;

        $tmp = ord($c);

        $nr ^= ((($nr & 63) + $add) * $tmp) + (($nr << 8) & 0xFFFFFFFF);

        $nr2 += (($nr2 << 8) & 0xFFFFFFFF) ^ $nr;

        $add += $tmp;

    }

    if ($nr2 > PHP_INT_MAX)

        $nr2 += PHP_INT_MAX + 1;

    $bit = (1 << 31) -1;

    return sprintf("%08lx%08lx", $nr & $bit, $nr2 & $bit);

}