What would this code be in php...

[fearfx]

<if condition="is_member_of($bbuserinfo, X,Y) ">
<a href="http://www..com/usercp.php">User CP</a>
</if>

How would I reproduce the code above into php...

Thanks

[Dismounted]

if (is_member_of($vbulletin->userinfo, X, Y))
{
// do this
}