i am good in php and bad in classes ( simple question )

[eluser]Mr.CodeIgniter[/eluser]
if i have this class :

Code:

class test{
   function hellow(){
      echo"hellow world";
   }
}
$name = new test();
$name->hellow->test2();

i know function test2 not exist , but if i want create it and call it like example
at end line , where i can create it.
i hope to undersand me .