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) { echo 'yes'; }; 

That all works just fine. Is it possible to use a variable in place of the operator? Something like:

$e = ||; 

Which I could then use as

if($a>$b $e $c>$d) { echo 'yes'; }; 

Answer 1

No, that syntax isn't available. The best you could do would be an eval(), which would not be recommended, especially if the $e came from user input (ie, a form), or a switch statement with each operator as a case

switch($e) {     case "||":         if($a>$b || $c>$d)             echo 'yes';     break; }