Check if user with ID or name X is online

2 comments

1. I think the function you want is is_user_logged_in. Maybe try

   wp_set_current_user($id, $name = '')
   

   To set the current user by id, and then check if they are logged in using

   is_user_logged_in()
   

   http://codex.wordpress.org/Function_Reference/wp_set_current_user

   http://codex.wordpress.org/Function_Reference/is_user_logged_in

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2. jkeesh has a good solution, but that may not offer live information. is_user_logged_in() is a conditional statement for performing actions.

   It’s helpful if you want to do this for example:

   When logged in, show smiley.jpg

   When logged out, don’t show smiley.jpg

   If you are simply trying to do one of those features which forums have that show “x number of users online” and list their usernames, I don’t believe this conditional statement can do that. That would either require some custom code or another plugin.

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