How can I access a custom profile field in forumdisplay.php?

[BirdOPrey5]

Is this even possible? Basically I made an IF statement saying

PHP Code:

if  ($post[field5] == "Yes")
   Do Something... 


also tried it with single quotes around 'field5' but in neither case does the if statement ever become true even when I know Field5 is a Yes/No option box and set to "Yes" exactly.

Is there someway of accessing the custom field from the php file?

Any help is much appreciated.

--------------- Added [DATE]1277756882[/DATE] at [TIME]1277756882[/TIME] ---------------

Also tried $bbuserinfo but no go either.

--------------- Added [DATE]1277772863[/DATE] at [TIME]1277772863[/TIME] ---------------

OK got it working 2 ways...

$vbulletin->userinfo[field5]
and
$vbulletin->userinfo['field5']

My question is now- which is the 'proper' way to code it for maximum compatibility- is there a difference?