Скачать или смотреть How to Display an Image Thumbnail for Custom Post Type in WordPress Programmatically

Learn how to programmatically display an `image thumbnail` for your custom post type in WordPress using PHP code, enhancing your website's visual representation with minimal effort.
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This video is based on the question https://stackoverflow.com/q/65805443/ asked by the user 'Pradeeshwar M' ( https://stackoverflow.com/u/14943132/ ) and on the answer https://stackoverflow.com/a/65805830/ provided by the user 'Sco' ( https://stackoverflow.com/u/8785045/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Displaying Image Thumbnails for Custom Post Types in WordPress

If you’re working with custom post types in WordPress, you may encounter a situation where the image thumbnails are not being displayed correctly. Instead of the expected images, you might only see the image URLs printed out. This guide aims to guide you through the process of fixing this problem and ensuring that your image thumbnails are displayed as intended.

The Problem

When creating custom posts in WordPress using wp_insert_post, it is common to fetch data from a database. While your title and content might display correctly, the image thumbnail often does not render, leading to the URL being displayed instead. This happens because you need to properly set the post thumbnail (featured image) in WordPress.

The Solution

We can resolve this issue by programmatically inserting the image content into the post and updating the post meta to include the image as its featured thumbnail. Below are the steps to achieve this.

Step 1: Modify the Post Content

To include an image within your post content, you'll want to append the image tag directly into the post_content. Here’s how to do that:

[[See Video to Reveal this Text or Code Snippet]]

This appends an <img> tag to the post content, allowing the image to show up along with the text description on the front end.

Step 2: Insert the Image as Attachment

To set the image as a featured thumbnail in WordPress, you need to perform the following actions within your existing logic where you insert the posts:

[[See Video to Reveal this Text or Code Snippet]]

Explanation

Upload the Image: We use wp_upload_bits to upload the image file to the WordPress media library.

Check File Type: The wp_check_filetype function checks the file type of the image being uploaded.

Create Attachment Array: An array is created with the necessary attributes for the image attachment.

Insert Attachment: We insert the image as an attachment linked to the post.

Generate Metadata: The attachment metadata is generated and updated.

Set Featured Image: Finally, we set the uploaded image as the post thumbnail using set_post_thumbnail.

Wrapping Up

By following these steps, you should have successfully resolved the issue of the missing image thumbnail in your custom post type. Now, along with displaying the title and description, your custom posts will also showcase the appropriate images, enhancing the overall aesthetics of your WordPress site.

If you have any questions or need further clarification, feel free to leave a comment below! Happy coding!