Include or Exclude Category for RSS Feed or Search

There are certain times when you need to include or exclude certain categories in the feed or search results. The easiest way to take care of this is to add the following to your functions.php file.

function sdac_remove_from_feed( $query ) {
	if ( $query->is_feed ) {
		$query->set( 'cat',-1 );
	}
        return $query;
}
add_filter( 'pre_get_posts','sdac_remove_from_feed' );

The code above will exclude all posts that are in the category with ID 1 from your feed. If you wanted to exclude everything from the search results – you would change one line:
$query->is_feed to $query->is_search

If you wanted to only show items from the category with ID 1 – you would just need to remove the “-” before the category number.

Note: You can include/exclude items tagged, etc by changing the ‘cat’ to whatever else you would normally use in the query.

HOWTO: Add a Custom Comment Class to WordPress

Ever need to add your own class to your WordPress comment template but not sure how because of the function comment_class that controls the classes? Check out the function comment_class and you will see adding your own custom classes very easily.

Allow this sounds pretty basic – it is a lifesaver for doing a lot of customizations.

Show One WordPress Post

There is a great function you might be aware of that allows you to get one WordPress post and display it anywhere you would like (header, sidebar, home page, etc).

To show only one post, use the function get_post.

Example:

post_title;
$sdac_content = $show_post_id->post_content;
?>
<h2></h2>
 

The code above will show the title and content of the post with the post ID of 10. If you are not sure what your post ID is, go to the manage screen in the WP-Admin, and hover over the post title. In your browser status bar, you will see the URL – and the post ID is the number at the end of the URL.

Search Specific Category in WordPress

There are some times when you want to limit your search to a particular category, or perhaps multiple categories. This is relatively simple to do in WordPress by adding a hidden field to your search code. (See example below)

<form method="get" id="search form" action="/">
<div>
<input type="text" value="" name="s" id="s" />
<input type="hidden" value="22" name="cat" id="scat" />
<input type="submit" id="search_submit" name="Search" value="Search"/>
</div>
</form>

You can see I added my hidden input field on the third line. When I add this in, it then adds onto the query used to search. Your search will go from something like http://www.sandboxdev.com/?s=WordPress to http://www.sandboxdev.com/?s=WordPress&cat=22 and will only return posts in the category ID you choose.