Seriously what's with the animosity? Someone gave you the best help, they pointed you to knowledge. In the future please research things. Don't expect people to do something for you. Most things on not having time is priority, you make time for what's important to you.As for things like sql injection phpacademy on youtube has some basic tutorials on how to do sql injection and how to prevent it. There are several resources out there. I actually would not recommend writing your own CP until you get pretty advanced in PHP or some other serverside scripting as you could actually end up making something even less secure. The best tool you can have against hacking is knowledge. Learn it.