August 2012
Beginner
583 pages
16h 1m
English
Content preview from Learning PHP, MySQL, JavaScript, and CSS, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
XHTML
I’ve used some elements of XHTML (Extensible Hypertext Markup
Language) already in this book, although you may not have realized it. For
example, instead of the simple HTML tag <br>, I’ve been using the XHTML <br /> version. But what’s the difference
between the two markup languages?
Well, not a lot at first glance, but XHTML improves on HTML by clearing up a lot of little inconsistencies that make it hard to process. HTML requires a quite complex and very lenient parser, whereas XHTML, which uses standard syntax more like XML (Extensible Markup Language), is very easily processed with quite a simple parser—a parser being a piece of code that processes tags and commands and works out what they mean.
The Benefits of XHTML
Any program that can handle XML files can quickly process XHTML documents. As more and more devices such as iPhones, BlackBerries, and Android and Windows Phone devices (not to mention a plethora of new tablet devices) become web-enabled, it is increasingly important to ensure that web content looks good on them as well as on a PC or laptop’s web browser, and the tighter syntax required by XHTML is a big factor in helping this cross-platform compatibility.
What is happening right now is that browser developers, in order to be able to provide faster and more powerful programs, are trying to push web developers over to using XHTML, and the time may eventually come when HTML is superseded by XHTML—so it’s a good idea to start using it now.
XHTML Versions
The XHTML ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.