To exclude posts from a WordPress page, change the query that supplies those posts—do not hide them with CSS. For an existing blog, homepage, archive, or feed loop, use the pre_get_posts hook and set category__not_in to an array of numeric category IDs. For a template that creates its own loop, use a separate WP_Query with the same argument.
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The important details are choosing the correct query, using category IDs rather than slugs, and limiting any hook callback to the intended front-end main query. The examples below show how to exclude one or several categories without breaking unrelated loops or pagination.
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What category exclusion actually changes
WordPress builds a query before it retrieves posts for a blog index, static page, archive, search result, or feed. Category exclusion changes that query so matching posts are not returned in the first place. The posts remain published and accessible through any other query that includes them; they simply do not appear in the particular list you changed.
This is different from a CSS solution. CSS can hide a card after WordPress has already queried and rendered it, but it does not remove the post from the HTML, pagination calculations, feeds, or other consumers of the query. Query-level exclusion is the appropriate solution when the requirement is “do not include posts in this list.”
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Identify the page and the category ID first
Determine which request you want to change
“WordPress page” can mean several different requests:
- Blog index: the page WordPress treats as the posts page. In a normal blog setup, the main query reports this with
$query->is_home(). - Static front page: a page assigned as the site front page. Its main query is not automatically the same as the posts-page query.
- Category or other archive: a taxonomy or date archive with its own main query.
- Feed: an RSS or other feed request, which may need an explicit feed condition.
- Custom page template: a template that runs a second, custom loop rather than relying on the page’s main query.
Write down the exact request before editing PHP. A condition that works for the blog index may do nothing on a static front page or may affect the wrong archive.
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The category__not_in parameter expects category IDs, not category names or slugs. In the dashboard, open Posts > Categories and edit the category. The category’s edit URL or term information exposes its numeric ID. If you are working in code, WordPress term APIs can also retrieve the term object and its term_id.
For example, if the category ID is 12, use array( 12 ). Do not pass 'news', 'News', or a URL slug to category__not_in.
Choose the right implementation
| Situation | Recommended approach | What you must control |
|---|---|---|
| The site’s existing blog, homepage, archive, or feed loop must change | pre_get_posts |
Check that the request is front-end, is the main query, and is the exact page or request type you intend to alter. |
| A template owns a separate list of posts | A dedicated WP_Query with category__not_in |
Set post type, pagination, and loop output inside that custom query. |
You are considering replacing the main loop with query_posts() |
Do not use it for this job | Use pre_get_posts to modify the existing main query, or create a separate WP_Query. |
The distinction matters because pre_get_posts receives the query object before it runs, while a custom WP_Query creates an additional query under your control.
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Exclude a category from the existing blog or home query
For the normal posts index, add a callback to pre_get_posts. This example excludes category ID 12 only from the front-end blog query:
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add_action( 'pre_get_posts', 'exclude_category_from_page' );
function exclude_category_from_page( $query ) {
if ( is_admin() || ! $query->is_main_query() ) {
return;
}
// Exclude category ID 12 from the blog/home query.
if ( $query->is_home() ) {
$query->set( 'category__not_in', array( 12 ) );
}
}Replace 12 with the category’s real numeric ID. The early return prevents dashboard queries from being altered. The is_main_query() check prevents the callback from changing secondary loops such as a sidebar widget, a related-posts block, or another component that happens to run during the same request.
Exclude several categories
Pass every category ID in the array:
<?php
$query->set( 'category__not_in', array( 12, 18, 25 ) );Posts matching any of the listed category IDs are excluded from that query. Keep the array numeric and comma-separated.
Use the correct condition for your front page setup
is_home() identifies the posts index, not every page that visually looks like a homepage. If the site uses a static front page, first decide whether you want to change the posts page, the static front-page query, or a custom post list embedded in the page. Then use a condition that matches that request on the passed $query object.
For an archive or feed, combine the same exclusion with the relevant query condition. The principle is unchanged: check the request type, confirm it is the main query, and set the exclusion only there. Avoid broad callbacks that set category__not_in for every front-end request unless that site-wide behavior is intentional.
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Exclude a category from a custom page loop
Use a separate WP_Query when the template is responsible for fetching and displaying its own posts. Include pagination arguments in that query so navigation reflects the filtered result set:
<?php
$posts = new WP_Query(
array(
'post_type' => 'post',
'category__not_in' => array( 12 ),
'paged' => get_query_var( 'paged' ) ? get_query_var( 'paged' ) : 1,
)
);
if ( $posts->have_posts() ) {
while ( $posts->have_posts() ) {
$posts->the_post();
// Output the title, excerpt, date, and other fields here.
}
// Output pagination for this custom query here.
}
wp_reset_postdata();The post_type argument keeps this example focused on standard posts. The paged value carries the current page number into the custom query; without it, a page-two request can show page-one results again. After the loop, wp_reset_postdata() restores the global post data for the rest of the template.
A custom query is usually the cleanest choice when a page contains a hand-built post grid and the site’s primary query should remain unchanged. It also lets different components on the same page use different category rules.
Alternative syntax with a negative category ID
WordPress also documents category exclusion through the cat argument. Prefix each category ID with a minus sign:
<?php
$args = array(
'cat' => '-12,-18',
);
$posts = new WP_Query( $args );This excludes categories 12 and 18. The syntax is useful when the rest of a query already uses cat, but category__not_in is generally clearer when the code’s purpose is specifically to express exclusions. Do not combine a category slug with the negative syntax; the values are numeric IDs.
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Where to put the code safely
Site plugin
A small site-specific plugin is a durable location for query behavior because it is independent of the visual theme. Create a plugin file with a valid plugin header, place the hook and callback in it, and activate it from Plugins. This keeps the exclusion when the theme changes.
Active or child theme
You can place the callback in the active theme’s PHP code or, preferably, a child theme if the site’s design is inherited from a parent theme. A parent-theme update can overwrite direct edits, so keep a copy of the change and use version control or another backup process.
Deployment precautions
- Back up the site and database before editing PHP.
- Check the category ID on the same site where the code will run; IDs can differ between installations.
- Make sure the file containing the callback loads before the request’s main query is executed.
- Use the site’s PHP coding standards and syntax supported by its WordPress and PHP versions.
- Test while logged out or in a private browser window so cached admin views do not mislead you.
Common mistakes and precise fixes
The category still appears
- Wrong value type: replace a slug or name with the numeric
term_id. - Wrong request condition: verify whether the page is the posts index, a static front page, an archive, or a custom loop.
is_home()will not identify every page labeled “Home.” - Cached output: purge page, object, or reverse-proxy caches after changing the query, then retest.
- Another loop is rendering the post: the main query may be filtered while a widget or custom block runs its own unfiltered
WP_Query. Add the exclusion to that separate query as well if it should also be filtered. - The callback never loads: check that the plugin is active or that the edited theme/child-theme file is the one the site actually uses.
Unrelated lists lose posts
This usually means the callback changes every query. Keep both safeguards:
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if ( is_admin() || ! $query->is_main_query() ) {
return;
}Then place the $query->set() call inside a narrow condition for the intended page or request. If you intentionally need a site-wide exclusion, document that decision and test search, archives, feeds, widgets, and any custom loops separately.
The dashboard or an editor preview behaves strangely
An unguarded pre_get_posts callback can affect administrative queries. The is_admin() early return prevents that in ordinary requests. Preview and editor screens can involve additional requests, so inspect each request type rather than assuming the front-end condition covers them.
Pagination is wrong in a custom loop
For a custom WP_Query, pass the current paged value and generate pagination from that query’s totals. Do not rely on the global main query’s pagination when the displayed list comes from a different query.
Using query_posts() caused side effects
query_posts() replaces the main query and can interfere with pagination, globals, and other template behavior. For an existing main loop, adjust the original query with pre_get_posts. For an additional list, instantiate WP_Query and reset post data after the loop.
Apply exclusions to archives and feeds deliberately
Excluding a category from the blog index does not automatically establish the same rule for every other request. Decide whether the category should be absent from:
- the posts page only;
- the static front page;
- category, date, author, or other archives;
- RSS or other feeds; or
- all of the above.
Then add separate, readable conditions for those request types. A feed may be consumed outside the website, so test it directly after changing its query. An archive condition should be specific enough that you do not unintentionally remove posts from unrelated archive pages.
A practical testing checklist
- Record the category ID and confirm that at least one known post belongs to it.
- Open the target page in a logged-out browser and verify that the known post is absent.
- Confirm that a post from an allowed category still appears.
- Check page two of the listing, if pagination exists.
- Open a sidebar, related-posts area, or other secondary list and confirm it changed only if you intended it to.
- Test the site’s relevant archive and feed URLs if those requests should share the exclusion.
- Open the dashboard and edit a post to ensure administrative screens still show normal category data.
- Purge relevant caches and repeat the front-end checks.
Which method should you use?
Use pre_get_posts when you need to alter the query WordPress already created for the blog index, an archive, or another main request. Its strength is that it preserves the normal loop and pagination while giving you a precise point to add the exclusion.
Use a dedicated WP_Query when a template or component owns a separate post list. You can then give that list its own categories, post type, ordering, and pagination without changing the rest of the page.
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Use the negative cat form only when it makes an existing argument set easier to understand. Otherwise, category__not_in states the intent more directly.
Quick Recap
Key points to remember
- Category exclusion belongs in the query, not in presentation-layer CSS.
category__not_inaccepts an array of numeric category IDs.pre_get_postsis the normal way to adjust an existing main query.- Guard callbacks with an administrative check and
$query->is_main_query(). - Match the conditional—such as
is_home()—to the exact request you want to change. - Preserve the
pagedargument and reset post data in custom loops. - Avoid
query_posts()for category exclusion.
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