What does “return $this” mean?

Question

I\'m trying to understand this code, and when I arrived at the final line, I didn\'t get it. :(

Can I have your help in order to find out, what does re

Answer 1

$this means the current object, the one the method is currently being run on. By returning $this a reference to the object the method is working gets sent back to the calling function.

So anyone doing

 $foo2 = $foo->SetOptions($bar);

$foo2 now refers to $foo also.