Posted by Chung Leong on 11/12/29 11:48

kasztelix@gmail.com wrote:
> I belive it is not redundant. Look here:
> http://uk.php.net/manual/en/language.references.whatdo.php
>
> Not using the & operator causes a copy of the object to be made. If you
> use $this in the class it will operate on the current instance of the
> class. The assignment without & will copy the instance (i.e. the
> object) and $this will operate on the copy, which is not always what is
> desired. Usually you want to have a single instance to work with, due
> to performance and memory consumption issues.

PHP uses copy-on-write. Variable separation would only occur if there's
a reference to the object returned.

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