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

[nier3]

Hi, can I use this code:

Code:

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

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for "Location"?

I would like to show on postbit_classic: Location: $post['fid1']  only if 'fid1' (Location) is populated.

Thanks