Echo something if its not the last record?

[denhamd2]

I have a loop outputting datbase entries below. How do I make the comma (,) echo for all records except for the last record?

<?php do { ?>
<?php echo ","; ?>
<?php } while ($row_get_subs_and_cats = mysql_fetch_assoc($get_subs_and_cats)); ?>

[lth2h]

I'd try something like this (if you're using MySQL for the D😎:

$result=mysql_query($SQL);
$num_rows = mysql_num_rows($result);

$count=0;

while ($count <= $num_rows) {

 $row = mysql_fetch_array($result);

 echo $row["field1"];

 if ($count != $num_rows) {

      echo ", ";
 }

 $count++;
}

[denhamd2]

Where do I place this in relation to my existing code?