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Posted by kasztelix on 10/20/57 11:48
Chung Leong napisal(a):
> It's redundant. = and =& do the same thing. The author does it either
> because he doesn't understand PHP's copy-on-write mechanism or he
> trying to be consistent between PHP 4 and PHP 5, where objects are
> always assigned by reference.
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.
While you can use the @ operator to mute any errors in the constructor
when using it as @new, this does not work when using the &new
statement. This is a limitation of the Zend Engine and will therefore
result in a parser error.
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