December 2001
Intermediate to advanced
520 pages
13h 42m
English
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Validating Forms
Security begins with the server's operating system and ends with the user interface. One very common and slippery issue is HTML forms. HTML forms are ubiquitous on the Web, particularly in more advanced Web applications. The security concern lies in the fact that the PHP page handling the form will do something with the information the user enters: store it in a database, pass it along to another page, or send an email. If the information the user enters is tainted, you could have a major problem on your hands. As a rule, do not trust the user! Mistakes can happen, either on purpose or by accident, that could reveal flaws in your code, cause the loss of data, or bring your entire system to a crashing halt.
This first code example ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.