You’re running your code on the wp_loguout hook, which is after the user has logged out, so of course there’s no current user ID. There’s no current user at all. If you look at the documentation for the wp_logout hook, you will see that the ID of the user that was logged out is passed … Read more
You can add a low priority authenticate hook that runs after all the other hooks and rejects authentication for a specific user ID: function wpse_384212_ban_user_id( $user, $username, $password ) { // At this point $user is either a WP_User object if they’ve successfully logged in, // or null or a WP_Error if they haven’t. We … Read more
Custom Post Type with Sequence ID
The only way I could think to achieve this would be to query the DB and build a list of ids, then check to make sure none of the ids match, but that might be a very taxing query. You would also need to change the way the id’s for each table would be updated … Read more
Can you try to escape the variable $post_id? Like so: ”.$post_id.” So use the single quote twice. You are querying a slug and your variable is a number.
Use get_userdata() to get a user object, and the email address will be the email property: $userdata = get_userdata( $user_id ); if ( ! $userdata ) { return false; } echo $userdata->email;
Bookmarking custom template pages which all have the same page ID
Give custom page template a custom post ID
Give ID to divs inside the loop
How to get Previous Visited Page Information