<?php

class t

{

var $num;

var $dynamic_function;

public function dynamic_function()

{

$func = $this->dynamic_function;

$func($this);

}

}

$p = new t();

$p->num = 5;

$p->dynamic_function = function($this_ref)

{

echo $this_ref->num++.'<br />';

};

$p->dynamic_function();

$p->dynamic_function = function($this_ref)

{

echo $this_ref->num.'<br />';

$this_ref->num *= 3;

};

$p->dynamic_function();

$p->dynamic_function();

$p->dynamic_function();

echo $p->num;

/*

5

6

18

54

162

*/

?>

  session_start();

$authorise = function($func) {

     return function() use ($func) {

         if ($_SESSION['is_authorised'] == true) {

             $args = func_get_args($func);

             call_user_func_array($func, $args);

         }

         else {

             echo "Access Denied";

         }

     };

 };

$a = function($foo)  {

     echo "Service returns: $foo";

 };

$service = $authorise($a);

$_SESSION['is_authorised'] = true;

$service('123',"2222222");

$_SESSION['is_authorised'] = false;

$service('test 2');