How to put an unknown mathematical sign between two arrays?

Question

PHP

there is a code like this <?php echo $a + $b ?> which outputs addition. now you need to do what would be displayed not +, but what is in the array $ c. there can be +, -, *, /.
how to make it so that instead of the + sign, an unknown mathematical sign, aka $c , is displayed?
thanks in advance!

Answer 1

function doAction($a, $b, $action) {
     switch ($action) {
          case "+": return $a + $b;
          case "-": return $a - $b;
          case "*": return $a * $b;
          case "/": return $a / $b;
          default: throw new \BadFunctionCallException("Unknown action");
    }
}

Well, or use eval

Answer 2

Hm) Cool question.
Only the function with the switch came to mind, like Immortal_pony.

Answer 3

https://wiki.php.net/rfc/operator-overloading
Through class creation and operator overloading!