[wp-hackers] Exclude Categories From The Loop

[Kevin]

Unless something has changed shouldn't the code referenced in the
codex loop page work?
http://codex.wordpress.org/The_Loop

Specificly:
<?php if (in_category('3')) continue; ?>

Obviously this isn't optimized from a SQL perspective (you're still
pull all posts from the DB, just not displaying some of them), but it
does what was asked for.

Kevin

On 10/5/07, Paul Menard <paul at codehooligans.com> wrote:
> I generally exclude/include categories using a simple function I keep
> in the functions.php file. The following example was setup because
> the client only wanted content from the category '1' displayed on the
> home page.
>
> function myHomePostsFilter($query)
> {
>         if ($query->is_home)
>         {
>                 $query->set('cat','1');
>         }
>         return $query;
> }
> add_filter('pre_get_posts','myHomePostsFilter');
>
> The is_home has other sibling functions like is_search, is_list, etc.
> Via the query set() you can also pass the second argument as '-1, -2,
> -3'. I turned this into a simple plugin. It has two admin panels, one
> for categories and one for pages. The pages section is used to simply
> exclude pages from search. But there are other 'actions' where pages
> may need to be excluded. But it's not all that clean. If anyone wants
> to see this let me know. Also this code works well for WP2.2 and
> below. HAve not looked into using this similar for tags.
>
> There was a plugin I found for pre-WP2.1 called Category Visibility.
> It was doing some very complicated MySQL queries and would not work
> with 2.2. This seemed like overkill.
>
>
>
> P-
>
>
>
>
> On Oct 5, 2007, at 1:54 AM, Michael D Adams wrote:
>
> > On Oct 4, 2007, at 7:37 PM, Matt wrote:
> >> Is it possible to exclude certain catgories from displaying in the
> >> loop,
> >> with a plugin?
> >
> > Do you mean exclude posts from the loop that belong to a specific
> > category?  I don't know if there's a better way to do this now, but
> > there's an old plugin by Ryan that can do this.
> >
> > http://wordpress.org/extend/plugins/front-page-cats/
> >
> > There's no UI.  Change $cats_to_show to '-28' (or whatever category
> > you want to exclude), and remove the is_home reference to get it to
> > work everywhere (... or maybe change it to !is_admin...).
> >
> > Michael
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>
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-- 
Kevin Kelley
http://technogeek.org/