title: how to protect website from sql injection and hacking etc
body: <p>I have create a small social network with eCommerce and blog etc. I have create the site with PHP and JavaScript. Fully hand code and no plugin. I didn't upload it because of security. This is my first website and I have also create the database. Now my question is what is the security I have to look and How to protect from all kind of attacks?
  If there is any tutorial or book for it, give me this link.</p>