Each WordPress post and a page has its own unique ID. Easy access to these ID numbers can come in handy when using plugins, widgets or theme options that require you to input specific IDs. For example, sometimes when specifying the featured slides in a theme’s slider, you’ll need to input a string of post and/or page IDs. Here’s how you can add a new column to the post listing page to show their IDs.

Add this snippet to your theme’s function.php file or create a little plugin for it, if you prefer:

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add_filter('manage_posts_columns', 'posts_columns_id', 5);
    add_action('manage_posts_custom_column', 'posts_custom_id_columns', 5, 2);
    add_filter('manage_pages_columns', 'posts_columns_id', 5);
    add_action('manage_pages_custom_column', 'posts_custom_id_columns', 5, 2);
function posts_columns_id($defaults){
    $defaults['wps_post_id'] = __('ID');
    return $defaults;
}
function posts_custom_id_columns($column_name, $id){
        if($column_name === 'wps_post_id'){
                echo $id;
    }
}

After you add this snippet, navigate to Dashboard > Posts or > Pages to see the new column displaying IDs:

This very useful snippet comes to you courtesy of our friend Kevin Chard of WPSNIPP.com, where they’re now rocking more than 600 unique WordPress code snippets. Drop by his site and check out all the new snippets added recently.