Basically, I'm working on these forums in PHP and I'm making it so that when you create a topic, it will update the forum's last post saying that the last post made was that topic. The issue is, I'm trying to make it so they can click a link and go to it but how am I supposed to get the topic id if it hasn't been created yet?
Try to create a random $codeTopic attribute that you know before your id is created and send the code attribute instead of the id (do not forget to add your $codeTopic to the database)