Thank you for helping me out. Yesterday, I have done creating my simple first PHP webpage (with inserting, update/modify, search/view records, delete data) it works fine. But today I checked again my webpage it doesn't work anymore and I open my database, what I see are lot of error it says : Backtrace hastag *&^^%^&$j2123 whatsoever. Im a newbie, I assumed that my webpage is vulnerable without any encription. So I deleted all of it. Way too hard to secure my pages.
In short, I ended up in nothing.