[wp-hackers] Exclude Categories From The Loop

[Jared Bangs]

On 10/4/07, Matt <speedboxer at gmail.com> wrote:
> On 10/4/07, Daniel Cameron <dan at scatter3d.com> wrote:
> >
> > I currently use this plugin,
> > http://wordpress.org/extend/plugins/sideblog/
> >
> Thanks, but I meant inside of my own plugin... I want to have a category
> that doesn't show up in the loop,  without the user having to change their
> loop in their theme files. So, is there like a filter or something to do
> this?

Untested pseudo-code partially extracted from the sideblog plugin
mentioned above:

function my_post_filter($query) {
	global $wp_query;

  if(!is_category() && !is_single() && !is_tag()){
  		$wp_query->set('category__not_in',$arrayOfCategoriesToIgnore);
  }

add_action('pre_get_posts','my_post_filter');

- Jared