September 2002
Intermediate to advanced
544 pages
13h 6m
English
Content preview from Sams Teach Yourself CGI in 24 Hours, Second Edition
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Hour 7. Validating User Input
One of the most common tasks required of CGI programs is validation of user input. Whether you’re taking an order online, allowing a user to subscribe to a mailing list, or enabling the user to enter stock symbols to look up a quote, it’s necessary to verify that the user entered all the required information in the form, and that the information entered is properly formatted.
There are a number of techniques that can be used for form validation, and in this hour, I’m going to cover some of the most effective ones. Over the course of this hour, you will learn
How to use JavaScript to validate form content
How to design forms that require less validation
How to design applications that efficiently incorporate form validation ...
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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.