PHP use string as operator

Question

Say I have a string, $char. $char == \"*\".

I also have two variables, $a and $b, which equal \"4\" and \"5\" respectively.

How do I get the res

Answer 1

You can do with eval however I would not suggest using eval.

If there is case operator can by anything you should check what operator is before using

switch($char)
{
  case '*':
    $result= $a * $b;
    break;

  case '+':
    $result= $a + $b;
    break;
}