vBulletin is an excellent product that gives the admin amazing control over their vBulletin Forum directly from the templates themselves. You can use
PHP if conditionals directly within the template system thanks to vBulletin.
There are too many possible ways to use conditionals to be able to list every single way but we can tackle some of the most popular ones.
I will first explain what the conditional is doing and then list the conditional below it.
If Viewer is a Member --------------------------------------------------
If you want to show a link only to registered members you would use this conditional.
HTML Code:
<if condition="$show['member']"></if>
If Viewer is in the Following Usergroups Array. Enter the Usergroup Number(s) Seperated by a Comma --------------------------------------------------
If you want to show an advertisement to viewers that are unregistered, registered members and awaiting email confirmation you would use the usergroup ids 1,2,3 within the array.
HTML Code:
<if condition="is_member_of($vbulletin->userinfo, 1, 2, 3)"></if>
If This Script Is or Is Not XXX --------------------------------------------------
If this script is
index (as used in the example below) then it will show the code within the conditional. You can use it to show a piece of code only on Forumhome if you have to put it in a template that is global such as the header. To find out what the script is per page open up the php file that loads the page like for instance showthread.php and look for
PHP Code:
define('THIS_SCRIPT', 'showthread');
and the showthread part is what you would use.
HTML Code:
<if condition="THIS_SCRIPT == 'index'"></if>
and here you can show information on every page but the index page by using this conditional
HTML Code:
<if condition="THIS_SCRIPT != 'index'"></if>
If this user equals or does not equal xxx --------------------------------------------------
What this conditional will do is only show certain information if the person viewing the page has the same userid as defined within the conditional. So if you put userid 667 inside the conditional below and put a link inside the conditional tags only the user that has the userid 667 will see that link.
HTML Code:
<if condition="$bbuserinfo['userid'] == 667"></if>
and it works the opposite way as well if you do not want information to show for 667 but you want it to show for everyone else you would use
HTML Code:
<if condition="$bbuserinfo['userid'] != 667"></if>
Display Information To Guests Only --------------------------------------------------
The following conditional will display information only to guests and no one else. This is helpful in displaying a welcome message that you only wish for guests to see.
HTML Code:
<if condition="$show['guest']"></if>
Display Information On a Per Forum Basis --------------------------------------------------
This conditional allows you to display information on a per forum basis. This can be helpful if you wish to display different advertisements depending on what forum that the user is in. You would simply replace X with the forum id that you wish the information to appear in.
HTML Code:
<if condition="$forum[forumid] == X"></if>
and on the other hand you can use the ! to do the opposite and display the information in every forum but the id you list
HTML Code:
<if condition="$forum[forumid] != X"></if>
or if you have multiple forums you wish to include something with you can use an array such as this
HTML Code:
<if condition="in_array($forum['forumid'], array(1,2,3,6))"></if>
If Usergroup Is or Is Not X --------------------------------------------------
If the user is a member of the x usergroup then show the code
HTML Code:
<if condition="$post['usergroupid'] == 6"></if>
and then you can use the ! to tell it to not show it to the x usergroup but show it to everyone else.
HTML Code:
<if condition="$post['usergroupid'] != 6"></if>
If Users Birthday is Less Than or Greater Than XXXX-XX-XX Do Something --------------------------------------------------
Just to show the power of vBulletin here is a cool conditional that will show information based on the birthday of the user. The one below will show "Too Young" if they were born after 01-01-1980.
HTML Code:
<if condition="$bbuserinfo['birthday_search'] > '1980-01-01'">Too Young</if>
and this one will show you "Too Young" if the user was born before 01-01-1980
HTML Code:
<if condition="$bbuserinfo['birthday_search'] < '1980-01-01'">Too Young</if>
If Thread is or is not in X Forum Execute Code --------------------------------------------------
For instance if you want a piece of code to appear within thread in a particular forum you can do so with this conditional.
HTML Code:
<if condition="$thread['forumid'] == X"></if>
If you want to show the piece of code on every new reply on every thread but 1 forum you can use this which says if thread is in forum x do not show the code but show it for all the other threads out side of forum x.
HTML Code:
<if condition="$thread['forumid'] != X"></if>
and of course you can define multiple forum ids with the array
HTML Code:
<if conditional="in_array($thread['forumid'], array(1,2,3,6))"></if>
Is user moderator of any forum? --------------------------------------------------
If the user is a moderator execute code.
HTML Code:
<if condition="can_moderate()"></if>
Is user moderator of current forum? --------------------------------------------------
If the user is a moderator of the current forum execute code
HTML Code:
<if condition="can_moderate($forum['forumid'])"></if>
Is user moderator of x Forum? --------------------------------------------------
If the user is a moderator of x forum execute code.
HTML Code:
<if condition="can_moderate($forum['x'])"></if>
Note: can_moderate() may add queries to your page. Is user the thread starter? --------------------------------------------------
Is the user the thread creator? If so execute code.
HTML Code:
<if condition="$threadinfo['postuserid'] == $bbuserinfo['userid']"></if>
Is user the thread starter? --------------------------------------------------
If the thread is closed execute code.
HTML Code:
<if condition="!$show['closethread']"></if>
Place Information After First Post --------------------------------------------------
Useful for adding a advertisement or other information after the first post on every page.
HTML Code:
<if condition="!$GLOBALS['FIRSTPOSTID']"></if>
Place Information After x Post On Every Page --------------------------------------------------
This will add your code directly after the post number you define on each page. If you put 2 in place of x the code will appear on every page after the second post.
HTML Code:
<if condition="$post['postcount'] % $vboptions['maxposts'] == x"></if>
Using If Else in Templates --------------------------------------------------
You can also use If Else conditionals within your templates. The below shows you how to correctly do this.
HTML Code:
<if condition="$show['guest']">
Show Guest This Message
<else />
Show Everyone but guests this message
</if> Contributors:
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Chroder
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SirAdrian
Other Useful Sources:
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vBulletin Manual - Template Conditionals
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vBulletin Community Forum - View Single Post - How to do 3 if conditionials?
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vBulletin Setup - Thanks 
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