Using a variable as an operator

Question

So I have something like the following:

$a = 3;
$b = 4;
$c = 5;
$d = 6;

and I run a comparison like

if($a>$b || $c>$d         


        

Answer 1

 public function checkOperator($value1, $operator, $value2)
    {
        switch ($operator) {
            case '%': // Percentage
                return $value1 % $value2;
            case '+': // Sum
                return $value1 + $value2;
            case '-': // subtraction
                return $value1 - $value2;
            case '*': // Multiplication
                return $value1 * $value2;
            case '/': // Divided
                return $value1 / $value2;
            case '': // Greater than
                return $value1 > $value2;
            case '>=': // Greater than or equal to
                return $value1 >= $value2;
            case '==': // Equal
                return $value1 == $value2;
            case '===': // Identical
                return $value1 === $value2;
            case '!==': // Not Identical
                return $value1 !== $value2;
            case '!=': // Not equal
            case '': // Not equal
                return $value1 != $value2;
            case '||': // Or
            case 'or': // Or
                return $value1 || $value2;
            case '&&': // And
            case 'and': // And
                return $value1 && $value2;
            case 'xor': // Or
                return $value1 xor $value2;
            default:
                return false;
        }
    }