Echo a comma on all but the last value? (result from mysql_fetch_array)

Question

How do I echo a comma on all but the last value? Here\'s my code:

while ($servdescarrayrow = mysql_fetch_array($servdescarray)) {

    ECHO $servdescarrayrow         


        

Answer 1

$array = array();
while ($servdescarrayrow = mysql_fetch_array($servdescarray))
    $array[] = $servdescarrayrow['serv_desc'];
ECHO implode(',', $array);