Show / Hide Yahoo! ID Condition

[terzier]

with "Custom Profile Fields" (in the forum index) I want to try show the online status ("YahooID" property of the staff only) belongs to the staff if they ("YahooID" property of the staff only) online and hide ("YahooID" property of the staff only) belongs to the staff if nothing online Or/And replace with "None"

PHP Code:

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<div class="trow1 smalltext"><strong>Yahoo! Online</strong> <br /> <if $mybb->user['fid4'] then> <a href="ymsgr:sendIM?{$mybb->user['fid4']}"> <img src="http://opi.yahoo.com/online?u={$mybb->user['fid4']}&amp;m=g&amp;t=5" border="0"></a> <else> None </if> </div>

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is this possible?
if possible, such as whether the code?
please correct my code if it is possible.