How to insert a conditional inside a plugin

[valdet]

Hi there,

I woudl like to know if it is possible to insert some type of conditional in a plugin, so I restrict a particular thing only to one thread
Like this

<if condition="$thread[threadid] == xx">
Use my trick
<else />
dont use it
</if>

maybe this needs a PHP conditional in teh shape of

if (!$vbulletin->thread['threadid'] AND $vbulletin->thread['xx']) {
plugin code;
}

Any quick help is appreciated.