问使用foreach添加数字时遇到麻烦

EN

$sql3=mysql_query("select serialno from milestone where (serialno ='".$serialno."')");<br/>
$promatch3=mysql_num_rows($sql3);
if($promatch3 > 0)
{
    $sql2=mysql_query("select serialno from milestone where (serialno >='".$serialno."')");
    {
    while($row2=mysql_fetch_array($sql2))
    {
        $jes3[]=$row2['serialno'];
    }

}
}
$jes4=implode(",",$jes3);
$jes5=array();
$jes5=explode(",",$jes4);
foreach($jes5 as $jes6)
{
    $sql6=mysql_query("update milestone set serialno='".$jes6."' +1 where serialno='".$jes6."'");
}