PHP incorrect output with loop

I am trying to construct the correct syntax for a php code, here it is, keeps displaying incorrectly. Any light on this? Thanks!

while ($row=mysql_fetch_array($upcoming))
{
$appid[$n]=$row['ID'];
$appdatetime[$n]=$row['apptdatetime'];
$schedulet[$l]=date('g:i A' , strtotime($appdatetime[$n]));
$schedulea[$l]=date("m/d/Y",strtotime($appdatetime[$n]));
$display .= $schedulea[$l] . "@" . $schedulet[$l] ;
$display .= ". To cancel, click <a href='cancellations.php?quickcancel=yes&id=" . $appid[$n] . '"  here</a><br>\n";
$display .= '</font><font size="2" face="Eras Demi ITC">\n';

if ($row['ID']=="")
{
$display .= '<font size="2" face="Eras Demi ITC">No Future Appointments Scheduled';
}
$n++;
$l++;
}

echo "$display";