How about just unformatted time. ie 

my $lasttime=from_db($userid); 
my $thistime=time; 
if ($thistime-$lasttime<(5*60)) { print 'online'."\n"; } 
set_db($userid,$thistime);

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In reply to Re: Using Timestamp to tell if someone is on the site by huck
in thread Using Timestamp to tell if someone is on the site by htmanning

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