December 2008
Intermediate to advanced
336 pages
6h 58m
English
Content preview from Securing PHP Web Applications
Navigating the Dangerous Waters of
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3 System Calls
In this chapter, we get under the hood and look at how PHP can interact with the operating system, and how to do so safely. We start out with some of the ways that PHP can pass commands directly to the operating system. Unfortunately, although those methods may be convenient, they are also an open invitation to hackers. Next, we show you ways to use the features of the operating system safely and show you how we’ve patched the sample guestbook application.
Navigating the Dangerous Waters of exec(), system(), and Backticks
Sometimes you have a task, such as creating or moving a file, that’s trivial to accomplish by passing it on to the operating system. Unfortunately, once your application starts ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.