Im new to wordpress.I have a plugin that returns the id of the logged in user.
This is the code.

global $current_user;
      $ul = 'Guest';
      if ( isset($current_user) )
          $ul = $current_user->user_login;
          $useremail = $current_user->user_email;
      if ($ul=='') { $ul = 'Guest';}
$outstr = "Hello, ".$ul;

Now what I need is to acces this plugin from outside the site. I need to get this userid when I provide the url of this plugin, from another site.
How can I do this ?

Read more here: Access plugin from another site in wordpress


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