[SOLVED] Concatenate

[hamishrock]

Just learning PHP.

How can I make a number have leading zeros.
My db is a varchar(3) and is assigned a number to it, but using the code below won't give me "015"

[color=blue]<?php
$topn = 1;
if (mysql_num_rows($result) > 0) {
while(list($memmax)=mysql_fetch_array($result)){
$topn =$memmax +1;
}
if ($topn < 10) {
$topns = "00" + $topn;
}
else
if ($topn < 100) {
$topns = "0" + $topn;
}
$sql = "Insert members (membership) Values '$topns'";
//echo "$sql";
//$result = mysql_query($sql);
}
echo $topn;
?>[/color]

[alpine]

It would be similar solutions as in this thread:
http://www.phpfreaks.com/forums/index.php/topic,112541.msg459432.html#msg459432