December 2001
Intermediate to advanced
520 pages
13h 42m
English
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Validating Forms with JavaScript
JavaScript is not a true security measure in itself, but rather an added level of security and a convenience to your users. Because JavaScript is a client-side technology (whereas PHP is server-side), incorporating it into your pages can save users the hassle of having to submit a form to the Web server, have it checked by PHP, and have the data sent back upon errors. Instead, you can use JavaScript to immediately run through some tests and then, if the data passes, send the form information along to PHP. However, JavaScript does this at the cost of a larger file size for the user to initially download.
I say that JavaScript in itself is not a security measure because it can be easily turned off in a user's browser ...
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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.