Prevent Posts in a Category From Displaying in WordPress’ Loop

By  on  

This code snippet has become a WordPress plugin!

Categories are obviously a major "classification" utility for websites and blogs that use WordPress.  Sometimes you want a category to represent more than just a basic post subject classification -- you may want a category of your blog to represent a link and writeup to an external site or may want to display their posts in a different way.  On this blog, I've added a "Quick Tips" category which are very short posts with tiny snippets of code that (quickly) detail how to do something simple.  I want those posts to display on listing pages, but not on the homepage.  I've seen some treacherous code to accomplish this feat, but luckily I've found a much cleaner way to prevent posts in a given category from displaying on a homepage.

The WordPress PHP

WordPress' API provides a pre_get_posts action which allows for additional pre-query logic:

// No "Quick Tips" on the homepage
function preventHomepageTips($query) {
	if($query->is_home() && $query->is_main_query()) {
		$query->set('cat', '-40'); // 40 is Quick Tips's category ID
	}
}
add_action('pre_get_posts', 'preventHomepageTips');

The custom function above is added as a WordPress action, usually within your functions.php file.  It's important you know the ID of the category or categories you don't want displaying in the main loop.  A dash is placed before said category ID.  To prevent multiple categories, separate them by commas:

$query->set('cat', '-40,-52');

If you simply want to prevent posts from displaying on the homepage but don't want to effect subsequent archive pages, you could add another hackish conditional:

if($query->is_home() && $query->is_main_query() && $_SERVER['REQUEST_URI'] == '/') {

This is an incredibly useful snippet that can be used for any number of purposes.  Chris Coyier, for example, uses a special category for his "Hot Links" posts (links to external websites) which he obviously doesn't displaying within the main loop.  There you have it though -- preventing posts in a category from displaying the loop!

Recent Features

  • By
    CSS @supports

    Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS.  What we end up doing is repeating the same properties multiple times with each browser prefix.  Yuck.  Another thing we...

  • By
    CSS vs. JS Animation: Which is Faster?

    How is it possible that JavaScript-based animation has secretly always been as fast — or faster — than CSS transitions? And, how is it possible that Adobe and Google consistently release media-rich mobile sites that rival the performance of native apps? This article serves as a point-by-point...

Incredible Demos

  • By
    HTML5 Datalist

    One of the most used JavaScript widgets over the past decade has been the text box autocomplete widget.  Every JavaScript framework has their own autocomplete widget and many of them have become quite advanced.  Much like the placeholder attribute's introduction to markup, a frequently used...

  • By
    Record Text Selections Using MooTools or jQuery AJAX

    One technique I'm seeing more and more these days (CNNSI.com, for example) is AJAX recording of selected text. It makes sense -- if you detect users selecting the terms over and over again, you can probably assume your visitors are searching that term on Google...

Discussion

  1. You the man.

  2. Hi there –

    I found your page while searching for something very similar to what you’ve done here, but instead of preventing a post from showing up on the homepage, I want to prevent it from showing up in a specific category.

    Here’s the thing: I have a category Cuisines and subcategories Italian, French, Spanish, etc. Each of those subcats has various recipes, as well as a post for the subcat itself (e.g., check out my Italian recipes!) I want the latter not to show up in the subcat, because obviously if you click them, they just link back to the same page you’re already on. I wonder if there’s an easy way to modify your code to accomplish this?

  3. Perfect! This is exactly what I was looking for! Thanks for sharing!

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!