How using php/mysql in template into IF conditions

[fabioski]

Many thanks Dismounted.

Where can I find a simple example/tutorial that explain to me how can I do waht you have explain to me?

--------------- Added [DATE]1204380066[/DATE] at [TIME]1204380066[/TIME] ---------------

I have create this plugin

Product: vBulletin
Hook Location: showthread_complete
Title: Helloworld
Plugin PHP Code: 
$testoski = 'hello world';
Plugin is Active: Yes

Then in the template SHOWTHREAD I add:

<p>Plugin: $testoski</p>

But it doesn,t work.