<?php
function calculator($number1 , $number2 , $Operator){
    switch ($Operator) {
        case '+':
           return $number1 + $number2;
            break;
        case '-':
           return $number1 - $number2;
            break;
        case '*':
            return $number1 * $number2;
             break; 
         case '/':
           return $number1 / $number2;
            break;   
        default:
           echo 'Please inter two number and Operator';
            break;
    }  
}
echo calculator(20,5,'+');
?>