I have a website with different topics and people can ask questions when they’re on a specific topic.

I used this code to automatically send the topic name in the php form:

<input type="hidden" name="TopicName" value="<?php echo $TopicName; ?>">

but now people can change the Topic Name if they change the input type from “hidden” to “text” .

I am using 1 html/php form for many different topics by using the $ variables.
Anyone got a solution for me?
Thankss

I tried many things but without success. Hope some1 can help me out.