How to Filter Posts In WordPress By Category?

16 minutes read

Filtering posts in WordPress by category can be achieved through several methods. One way is by using the built-in category functionality provided by WordPress. Here's how you can do it:

  1. Open your WordPress dashboard and navigate to "Posts" in the sidebar menu.
  2. Click on "Categories" to create the categories you want to filter by. Add all the relevant categories for your posts.
  3. Now, go back to "Posts" and click on "All Posts" to view all your existing posts.
  4. To assign a category to a post, find the "Categories" box on the right-hand side of the post editor.
  5. Check the box next to the category you want to assign to that post, or create a new category by clicking on "+ Add New Category".
  6. Once you have assigned categories to your posts, you can filter them by following these steps: Go to the "Posts" section and click on "Categories". Select the category you want to filter by. WordPress will display only the posts that belong to that category. You can further customize the filtered view by using the search bar or sorting options.


Alternatively, you can also filter posts by category using plugins available in the WordPress repository. Plugins like "Category Posts Widget" or "Post Grid" provide more advanced filtering options and allow you to display the filtered posts in different formats or layouts on your website.


Remember that filtering posts by category is an effective way to organize and display specific content on your WordPress website, helping your visitors navigate through relevant posts more easily.

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Can you apply multiple categories to a single post?

Yes, it is usually possible to assign multiple categories to a single post. Different content management systems or blogging platforms have different ways of implementing categories, but many will allow you to select or create multiple categories for each post. This can help organize and classify the content in various ways, making it easier for users to find relevant information on your website or blog.


Can you filter posts by category in the WordPress REST API?

Yes, you can filter posts by category using the WordPress REST API. The API supports several query parameters that you can use to filter posts based on categories.


To filter posts by category, you can use the category parameter along with the category ID or slug. For example, if you want to retrieve posts from the category with ID 3, you can make a GET request to:


http://example.com/wp-json/wp/v2/posts?categories=3


If you prefer to use the category slug instead of the ID, you can replace the category parameter value with the slug. For example:


http://example.com/wp-json/wp/v2/posts?categories=my-category


You can also filter posts by multiple categories by providing a comma-separated list of category IDs or slugs. For example:


http://example.com/wp-json/wp/v2/posts?categories=3,5,7


By using these parameters, you'll be able to filter posts by category in the WordPress REST API.


What is a post filter?

A post filter, also known as a secondary or final filter, is a type of filtration system used to further purify a substance or medium after it has passed through a primary filter. It is typically used in combination with pre-filters to achieve a higher level of clarity or cleanliness. Post filters are commonly used in various applications such as air purification systems, water treatment processes, industrial filtration systems, and in some cases, in photography and image editing software to refine and enhance the quality of images.

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Can you set up an automatic filtering system based on post categories?

Yes, it is possible to set up an automatic filtering system based on post categories. The specific steps to set up this system may vary depending on the platform or technology you are using, but here is a general guideline:

  1. Identify the categories: Determine the categories you want to use for filtering. For example, if you have a blogging platform, you may have categories like "News," "Tutorials," "Opinions," etc.
  2. Define the filtering criteria: Decide on the rules or criteria for each category. This can include keywords, tags, author names, or any other relevant information that can help identify posts belonging to a particular category.
  3. Configure the filtering system: Depending on your platform, you may have different options to set up the filtering system. If you are using a content management system like WordPress, you can utilize plugins like "Category Specific RSS feed Subscription" or "Advanced Category Excluder" to automatically filter posts into different categories.
  4. Apply the filters: As you create or publish new posts, ensure that each post is assigned to the appropriate category. This can typically be done within the post editor or settings of your platform.
  5. Test and refine: Once you have set up the automatic filtering system, test it by creating posts in different categories and confirming that they are correctly filtered. If any issues arise, adjust the criteria or configuration accordingly.


It is worth noting that specific platforms or technologies may have variations in terminology or steps, so it is recommended to consult your platform's documentation or seek assistance from relevant support channels for detailed instructions.


How to display the filtered posts in a grid layout?

To display filtered posts in a grid layout, follow these steps:

  1. Retrieve the filtered posts: Start by retrieving the posts that match your filter criteria from the database or wherever they are stored. This might involve querying a database or fetching data from an API.
  2. Determine the grid layout: Decide on the number of columns and the arrangement of the posts in the grid. For example, you might want a 3-column grid where each post occupies a fixed size or you may have a responsive grid that adapts to different screen sizes.
  3. Create the HTML structure: Use a container element (like a
    ) to hold the grid and give it a class or an id for easy targeting with CSS or JavaScript. Inside this container, create a separate element for each post in the filtered results. You can use a simple iteration loop or template engine to generate these elements dynamically.
  4. Apply CSS styling: Use CSS to style the grid and the post elements. Define the dimensions, margins, paddings, and any other visual attributes to achieve the desired grid layout. Make sure to use CSS classes or data attributes on the post elements if you need to target them individually.
  5. Render the grid: Insert the generated post elements into the container and display the grid on your webpage. You can use JavaScript to dynamically update the grid if your filtering mechanism allows for that.
  6. Add interactivity (optional): If you have any interactive elements like buttons or checkboxes for further filtering, you can add event listeners to them using JavaScript. These event listeners can trigger a refresh of the filtered posts based on the new criteria and re-render the grid.


By following these steps, you should be able to display your filtered posts in a visually appealing grid layout on your website or application.

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