php verify national code for iran

verifyIranNationalCode

 public static function verifyNatCode($code)
    {
        if (!is_numeric($code) || strlen($code) > 10)
            return false;

        $tempInt = intval($code);
        if ($tempInt == 0)
            return false;

        while (strlen($code) < 10) {
            $code = '0' . $code;
        }

        $codeCheckValue = substr($code, 9, 1);
        $codeArray = [];
        for ($i = 0; $i < 10; $i++) {
            array_push($codeArray, ['Number' => substr($code, $i, 1), 'Position' => 10 - $i]);
        }

        $verificationValue = 0;
        for ($i = 0; $i < 9; $i++) {
            $verificationValue += intval($codeArray[$i]['Number']) * $codeArray[$i]['Position'];
        }
        $tValue = $verificationValue % 11;
        $result = ($tValue < 2) ? $tValue : 11 - $tValue;
        return ($result == $codeCheckValue) ? true : false;
    }