是否可以在定义的常量中包含一个函数？

Question

According to https://www.tutorialspoint.com/php/php_constants.htm a normal costant is define by using define() function plus a value:

define('TEST', 123);

I think it would be interesting and useful if there were a way to define a constant with a function inside:

define ('ME', function($test){
   if($test == true){
       return "Whats up";
   }else{
       return "whats down";
   }
}); 

Then perhaps I could do something like this?

 if($I_Said === ME($val)){
     do something;
 }

Is there a such a way to do this?

Answer 1

There's no syntactical or other important difference on the caller side to:

function ME() {}

if ($I_Said === ME($val))

So, just do that.