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

Why not:

if ($servdescarryrow = mysql_fetch_array($servdescarray)) {
    echo $servdescarryrow;
}

while ($servdescarrayrow = mysql_fetch_array($servdescarray)) {
    ECHO ",".$servdescarrayrow['serv_desc'];
}