[wp-hackers] Should I always use reference when calling add_filter?

[scribu]

On Sat, Apr 21, 2012 at 9:34 PM, Ryan Chan <ryanchan404 at gmail.com> wrote:

> Why I am passing $this as reference if I do not expect it modify the
> value of $this? (I suppose it is bad), right?
>

Because in PHP4, if you didn't pass by reference, a new instance would be
created. I updated the Codex page.

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