PHP OOP question about reference

Posted by Starmaster on Stack Overflow See other posts from Stack Overflow or by Starmaster
Published on 2010-03-22T01:07:39Z Indexed on 2010/03/22 1:11 UTC
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Can one please explain with example what does $obj->$a()->$b mean? I've used PHP OOP quite a long time and have seen in some places this structure and not just this $obj->$a(); In what cases should I use it?

Thanks in advance!

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