variables questions

[Nitro212]

hello, a couple of weeks ago i cam across an interesting thread. but at that time i did not saved it, now i need it. the thread was about explaining the use of variables and such how tu use them on templates

such as this

<if condition="in_array($forumid, array(155,21,24,25,27,66,132))">
<if condition="in_array($forumid, array(42,45,112,74,43,44,45,46,114,118,119,136,113,134,137,142,143,144,64,30,123,32,34,35,150,151,152,153,154,156)) AND !is_member_of($bbuserinfo, 1)">

$forumid
$show

ect ect,, it explain what it was used for how to use it and stuff had a long list of vars

can any one help me finding it or has it booked mark or perhaps a better link they can share...

i would like to understand it more or perhaps a guide that will teach me about it

thanks for ur time

edit: sorry posted in wrong section can a mod move it pliz