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

If the SetOptions method is part of a ProgramOptions class or something, $this would refer to the class containing the method, so you would be passing back an instance of ProgramOptions.