Passing variable to a plugin?

[atzaman]

Hey all

I hope someone can help me with this.

I know how to create separate php files but can anyone tell me how I can pass a variable from the template to the php file? eg. how can I send the threadid to my php script so that I can use it there?

Many thanks for looking and thanks in advance if you're able to help

EDIT:

OK. I've worked out that I need to use $vbulletin->userinfo['usergroupid'] type thing on the php file but what would that be if I wanted the threadid?

I'm editing threadbit and FORUMDISPLAY if that helps.