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Welcome to Absolute FreeBSD! This book is a one-stop shop for system administrators who want to build, configure, and manage FreeBSD servers. It will also be useful for those folks who want to run FreeBSD on their desktops, servers, diskless system farms, and so on. By the time you finish this book, you should be able to use FreeBSD to provide network services. You should also understand how to manage, patch, and maintain your FreeBSD systems and have a basic understanding of networking, system security, and software management. We’ll discuss FreeBSD version 7, which is the version recommended for production use at the time this book is being released; however, most of this book applies to earlier and later versions as well.

This book has been written primarily for intermediate to expert PHP programmers. Although
programmers of all levels will benefit from this book, we do jump in to the deep end very
quickly, so some prior knowledge of PHP is assumed.
Having said that, if you’re relatively new to PHP, you will definitely benefit from this book
because it will formalize some of the techniques you have already learned and will show you
some different ways of approaching various problems.
In this book, I have made the assumption that you are familiar with HTML and CSS,
although since most of the code developed in this book is PHP and JavaScript, an advanced
knowledge of HTML and CSS is not critical. All JavaScript code is explained thoroughly, which,
in combination with the Prototype JavaScript library we will be using, makes the listings rela-
tively straightforward.

This is abook about object-oriented design and programming. It is also about tools for managing aPHP codebase from collaboration through to deployment. These two themes address the same problem from different but complementary angles. The aim is to build systems that achieve their objectives and lend themselves well to collaborative development.
A secondary goals lies in the aesthetics of software systems. As programmers, we build machines that have shape and action. We invest many hours of our working day, and many days of our lives, writing these shapes into being. We want the tools we build, whether individual classes and objects, software components, or end products, to form an elegant whole. The process of version control, testing, documentation, and build does more than support this objective, it is part of the shape we want to achieve. Just as we want clean and clever code, we want acodebase that is designed well for developers and users alike. The mechanics of sharing, reading, and deploying the project should be as important as the code itself.

This book teaches how to develop dynamic Web sites with PHP and MySQL, covering
the knowledge that most developers might require. In keeping with the format of the
Visual QuickPro series, the information is discussed using a step-by-step approach
with corresponding images. The focus has been kept on real-world, practical examples,
avoiding “here’s something you could do but never would” scenarios. As a practicing Web
developer myself, I wrote about the information that I use and avoided those topics
immaterial to the task at hand. Asa practicing writer, I made certain to include topics
and techniques that I know readers are asking about.
The structure of the book is linear, and the intention is that you’ll read it in order.

It begins with three chapters covering the fun damentals of PHP (by the second chapter,
you will have already developed your first dynamic Web page). After that, there are
three chapters on SQL (Structured Query Language, which is used to interact with all
databases) and MySQL. They teach the basics of SQL, database design, and the MySQL
application in particular. Then there’s one chapter on debugging and error manage-
ment, information everyone needs. This is followed by a chapter introducing how to
use PHP and MySQL together, a remarkably easy thing to do.
The following five chapters teach more application techniquesto round out your
knowledge. Security, in particular, is repeatedly addressed in those pages. Chapter 14,
“Making Universal Sites,” is entirely new to this edition of the book, showing you how

to broaden the reach of your sites. Finally, I’ve included three example chapters, in

which the heart of different Web applications are developed, with instructions.

Is this book for you?
This book was written for a wide range of people within the beginner-to-intermediate
range. The book makes use of XHTML for future compatibility, so solid experience
with XHTML, or its forebear HTML, is a must. Although this book covers many
things, it does not formally teach HTML or Web page design. SomeCSS is sprinkled
about these pages but also not taught. Second, this book expects that you have one
of the following:
- The drive and ability to learn without much hand holding, or…
- Familiarity with another programming language (even solid JavaScript skills About This

Book would qualify), or…
- Acursory knowledge of PHP Make no mistake: Thisbook covers PHP and MySQL from Ato Z,

teaching everything you’ll need to know to develop real-world Web sites, but

particularly the early chapters cover PHP at a quick pace. For this reason I
recommend either someprogramming experience or a curious and independent spirit
when it comes to learning new things. If you find that the material goes too quickly,

you should probably start off withthe latest edition of my book PHP for the World Wide
Web: Visual QuickStart Guide, which goes at a more tempered pace.
No database experienceis required, since SQL and MySQL are discussed starting at a
more basic level.