[wp-hackers] Multiple orderby and order options in WP_Query

[lonnyk at gmail.com]

Never mind. I get it now. :)

On Apr 5, 2011 3:08pm, lonnyk at gmail.com wrote:
> What happens when you call 'remove_filter' from inside the run_once  
> function and call the filter twice?

> On Apr 5, 2011 2:35pm, Otto otto at ottodestruct.com> wrote:
> > On Tue, Apr 5, 2011 at 12:33 PM, scribu mail at scribu.net> wrote:
> >
> > >> add_filter( 'posts_orderby', 'my_order' );
> >
> > >> $blah = new WP_Query(...);
> >
> > >> remove_filter( 'posts_orderby', 'my_order' );
> >
> > >
> >
> > >
> >
> > > Yeah, except remove_filter() will remove all callbacks attached to
> >
> > > posts_orderby, due to this bug:
> >
> > >
> >
> > > http://core.trac.wordpress.org/ticket/9968
> >
> >
> >
> >
> >
> > Bug doesn't apply. The remove_filter() function, in this case, works
> >
> > and does what you would expect it to do. It doesn't remove all
> >
> > callbacks.
> >
> >
> >
> > This code works perfectly, for example:
> >
> >
> >
> > function run_once() {
> >
> > return 'test';
> >
> > }
> >
> > add_filter( 'foobar', 'run_once' );
> >
> >
> >
> > function another_filter() {
> >
> > return 'test again';
> >
> > }
> >
> > add_filter( 'foobar', 'another_filter', 11 );
> >
> >
> >
> > remove_filter( 'foobar', 'run_once' );
> >
> >
> >
> > echo apply_filters( 'foobar', '' ); // produces "test again"
> >
> >
> >
> > -Otto
> >
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> >
> >