Show item on profile page if "x" field is populated

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(05-23-2012 04:44 AM)mdb Wrote:  Would I set $pattern = STEAM_X:X:XXXXXXXX or something before?

You can use it directly in the conditional.

I don't know much about the STEAM ID.
Based on your post:

(05-22-2012 06:34 PM)mdb Wrote:  IE: STEAM_#:#:########
Where the # is only numbers from 0-9

maybe you can write it like this:

Code:

<if preg_match('~^STEAM_\d:\d:\d{8}$~',$userfields['fid4']) then> <func htmlspecialchars_uni>{$userfields['fid4']}</func> </if>

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Or, if you're really sure about the output value, you can remove the htmlspsecialchars_uni for that.
Modify the pattern as your needs.