[wp-hackers] Class function in Hook

[Mike O'Malley]

On Sat, Aug 15, 2009 at 7:23 PM, John Kolbert <list at johnkolbert.com> wrote:

>
> // First
>        $bf_vendor = new bf_vendor();
>
>        register_activation_hook(__FILE__, array(&$bf_vendor,
> 'installTable'));


In the first, $bf_vendor is an instance of the class bf_vendor(); $bf_vendor
has it's own copy of any non-static member variables that are defined in the
class, and the method installTable() should probably only operate on those.

This loosely translates to: $bf_vendor->installTable();



> // Second
>
>        register_activation_hook(__FILE__, array('bf_vendor',
> 'installTable'));
>
>
In the second, you are registering installTable to be called as a static
method of the class bf_vendor. This loosely translates to:

bf_vendor::installTable();


> Both of these methods seemed to work. I was just wondering if there is any
> difference or preferred method between the two. Thanks guys.


If that is the case, you most likely don't have any non-instance member
variables of the class bf_vendor(). Which versions of php and which
configurations of php.ini support referencing static members/methods as
instance members/methods currently escapes me, but in general, it should be
avoided.

For more information:

http://us2.php.net/manual/en/language.oop5.static.php
and
http://us2.php.net/manual/en/language.pseudo-types.php#language.types.callback

--
Mike