How to Get the User ID of Viewing a Topic?

[halilesen]

During one of my works, I needed the ID of the user who viewed the topic page. I found a way to do this simply. I opened the /viewtopic.php file located in the phpBB root and found the following line (786):

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'TOPIC_POSTER'	=> $topic_data['topic_poster'],

and I added the following code to the next line:

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'USER_IDD'	=> $user->data['user_id'],

After saving the file, when I used the {USER_IDD} code in the /template/viewtopic_body.html file of my style, I could now get the user ID of the user viewing the page.

Best.