}
$test = new Calculator();
if ($oper1 === "") {
switch ($oper2) {
case "+":
$result = $test->add_two($num2, $num3);
break;
case "-":
$result = $test->subtract_two($num2, $num3);
break;
case "*":
$result = $test->multiply_two($num2, $num3);
break;
case "/":
$result = $test->divide_two($num2, $num3);
break;
case "^":
$result = $test->exponent($num2, $num3);
break;
default:
echo "ERROR";
}
} else {
$result = $test->three($num1, $oper1, $num2, $oper2, $num3);
}
header("Location: /?result={$result}");
?>
