Chapter 3. PHP SECURITY
When offering an Internet service, you must always keep security in mind as you develop your code. It may appear that most PHP scripts aren't sensitive to security concerns; this is mainly due to the large number of inexperienced programmers working in the language. However, there is no reason for you to have an inconsistent security policy based on a rough guess at your code's significance. The moment you put anything financially interesting on your server, it becomes likely that someone will try to casually hack it. Create a forum program or any sort of shopping cart, and the probability of attack rises to a dead certainty. ...
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