Are you looking for a way to return the current post ID? While there’s probably a plugin for this, we have created a quick code snippet that you can use to get post ID outside of loop in WordPress.
All you have to do is add this code to your theme’s single.php file or in a site-specific plugin:
<? global $wp_query; $postID = $wp_query->post->ID; ?>
Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly copy / paste code snippets in WordPress, so you don’t accidentally break your site.