I am writing a custom user plugin to write the session id and user id on a txtfile(This will be in turn used for some of my perl systems) after the user logins on Joomla. So far i have managed to create xml file and the main php file.


echo "hello"; //this works as when I login I can see the message on top of the message which makes me believe that the user plugin is installed correctly

// Whatever I try to print in the class, it seems to ignore.
class PlgUserperllogin extends JPlugin
    public function onUserAfterLogin($options)
          $user = JFactory::getUser();
          $user_id = $user->get('username');
          $usertype = $user->get('usertype');
          $session = JFactory::getSession();
          $sessionid = $session->getId();
          //write to txt file
          //set cookie for the same

I am not sure what is missing. I would really appreciate any help on this.

  • is this joomla 3 or 2.5? you might find the discussion here helpful also. joomla.stackexchange.com/questions/16754/… – jamesgarrett Jan 24 '17 at 23:31
  • Its Joomla 3 . I have tried it. Its just that the action doesn't seem to fire the event. If i print say hello , before the class begins it prints fine on joomla after login, but doesn't seem to recognize anything in the class. I would really appreciate any help this. – Teju Desai Jan 25 '17 at 8:37
  • there could be a few things wrong. 1. is your plugin in the plugins/user/yourpluginname folder? 2. do you open your class like: class PlgUserYourpluginname extends JPlugin 3. put a die() function in your code incase you're just being redirected before seeing any ouput. 4. slightly unrelated, you dont need to get the user object again, it's in the $options. – jamesgarrett Jan 25 '17 at 23:48
  • Yes, I have follwed the structure after reading the documentation and yet i do not undesratnd what i am missing. It just doesn't seem to fire the event not sure why. I will try to use the options array and get the user id and things. – Teju Desai Jan 26 '17 at 7:40
  • After trying various events just to see which event works. onUserLogout works , i am not sure why onUserAfterLogin doesn't work. I am really struggling to understand, why one event on the same class would work and other won't . – Teju Desai Jan 26 '17 at 8:27

The class name is case sensitive with Joomla, so make sure your plugin name is correct. For example, if the path of the plugin is:


then you would use:

class PlgUserSomething extends JPlugin

You should also be aware that usertype is deprecated. If you wish to get the group[s] of a user, have a look at another answer I wrote:


So for the actual plugin code, try using the following:


<?xml version="1.0" encoding="utf-8"?>
<extension version="3.6" type="plugin" group="user" method="upgrade">
    <author>My Name</author>
    <copyright>Copyright (C) 2017</copyright> 
        <filename plugin="something">something.php</filename>



class PlgUserSomething extends JPlugin
    public function onUserAfterLogin($options)
          // User data
          $user_id = $options['user']->id;
          $groups  = $options['user']->groups;

          $allGroups = '';
          foreach($groups as $group)
              $allGroups .= 'Group Id = ' . $group . ' ';

          // Session data
          $session = JFactory::getSession();
          $sessionid = $session->getId();

          JFactory::getApplication()->enqueueMessage('The user ID is: ' . $user_id);
          JFactory::getApplication()->enqueueMessage('The session ID is: ' . $sessionid);

          // $allGroups is a string containing all the groups
          // Write to txt file
          // Set cookie for the same

Of course changing PlgUserSomething to the correct value for you.

| improve this answer | |
  • I will keep in mind about the usertype and use groups instead. I have again double checked my class name to make sure, i am doing the right thing. Like mentioned, i tried to use OnUserLogout event and it works so i am not sure what is going wrong . It just doesn't fire it even if i put die to check whether there is a problem with my event. – Teju Desai Jan 26 '17 at 11:24
  • @TejuDesai - What exact version of Joomla are you using? – Lodder Jan 26 '17 at 11:32
  • I am using 3.6.4. – Teju Desai Jan 26 '17 at 11:55
  • I would really appreciate any help on this.... – Teju Desai Jan 27 '17 at 8:03
  • I'll try replicating the plugin at work today and get back to you – Lodder Jan 27 '17 at 8:12

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