JavaScript中的“call on declare”匿名函数相当于？

Question

I have some code that i want to be executed in a PHP script, but i don't want the variable created in this script to be visible otherwhere.

What i would like to do is like we can do using JavaScript :

(function() {
    // Do some stuff
})();

But i'd like to do this with PHP.

I've imagined the following code :

$main = function()
{
    global $main;
    unset($main);

    // Do some stuff
}

$main();

BUt it's not supported before PHP 5.3, and i need it to be.

Is there another way to do this with PHP 5.2 ?

Thanks in advance :)

Answer 1

call_user_func(
    // create_function('$param1, $param2', '
    function($param1, $param2) { 
        // do stuff
    }
    // ')
, "param1", "param2");

Use the lines commented out for php < 5.3

But I think many people will agree this is a weird thing to do.