更新 mysql 資料庫失敗

$sql = "update member_table set password=$pw, telephone=$telephone, address=$address, other=$other where username='$id'";


把update 資料庫的命令改成這樣...加上 '' ..

$sql = "update member_table set password='$pw', telephone='$telephone', address='$address', other='$other' where username='$id'";