Custom Columns Admin Area

Adding a custom column to the WordPress admin area can be useful when you want to display additional information about your posts or custom post types. Here’s how you can add a custom column:

function wpsnippets_custom_columns_header( $columns ) {
    $columns['custom_column'] = __( 'Custom Column', 'wpsnippets' );
    return $columns;
}

add_filter( 'manage_posts_columns', 'wpsnippets_custom_columns_header' );

function wpsnippets_custom_columns_content( $column_name, $post_id ) {
    
   if ( $column_name == 'custom_column' ) {

        // Add your custom column content here.
        echo 'Custom Column Content';
    }
}

add_action( 'manage_posts_custom_column', 'wpsnippets_custom_columns_content', 10, 2 );

This code adds a custom column with the header “Custom Column” to the post edit screen. The manage_posts_columns filter adds the custom column to the columns array, and the manage_posts_custom_column action is used to display the content of the custom column.

3. Modify the code to display the content you want in the custom column.
4. Save the file.

That’s it! Now, when you view the post edit screen, you should see the custom column with your content.

Need to add admin columns to a custom post type? See see this snippet: Add Admin Column to Custom Post Type.

Note: If you need to add admin columns to a custom post type, you can replace manage_posts_columns and manage_posts_custom_column with manage_{$post_type}_posts_columns and manage_{$post_type}_posts_custom_column, respectively, where $post_type is the name of your custom post type. For some examples, see this snippet: Add Admin Column to Custom Post Type.