How to hook into the Showthread and remove

[expat]

First of all $first_post is not a MyBB variable, it is a xThreads one, is not it?

You need to hook at showthread_start/end for whatever you are trying to do.

Check my plugin for an example.
https://github.com/Sama34/OUGC-Guests-Se..._gsofp.php

Although my plugin does use a dirty method I wouldn't really recommend.

hey thanks, i am actually decoding your plugins just to learn how to do a plugin