UserMeta Changes Meta Value for Post ID

I believe your issue is related to getting the correct post object on your single post page. From what I can detect from your question is that $post does not contain the post object which you expect. You must remember, $post is one of those very crappy globals which WordPress uses to store the current … Read more

get_user_by asking for string while string is given

If your code, you use the first argument passed to wp_authenticate_user filter callback. That is a WP_User object, it not a email address and it is not a string. You may be confusing because of the name of the variable, $username, I suggest to change the name to $user, whcih is more appropiate and it … Read more

How to use a transient inside WP_User_Query

Seeing that the referenced answer stores users_online as an array of timestamps indexed by user ID, you can use the include argument for WP_User_Query: $args = array( ‘include’ => array_keys( $logged_in_users ), // Other arguments );

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)