<?php
function calc (int $num1 ,int $num2 ,string $oprator)
{
  switch ($oprator) {
    case 'sum':
        return $num1 + $num2 ;
      break;
      case 'div':
          return $num1 / $num2 ;
        break;
        case 'mult':
            return $num1 * $num2 ;
          break;
          case 'sub':
              return $num1 - $num2 ;
            break;
    default:
      return "We have Error in Calculation";
      break;
  }
}
echo calc(10,2,"div");
 ?>