OReilly PHP in a Nutshell, A Desktop Quick Reference (2009).pdf

PHP in a Nutshell

Paul Hudson

Editor

Tatiana Apandi

Editor

Allison Randal

O'Reilly Media

About the Author

Paul Hudson, an avid PHP programmer, is Deputy Editor of

the popular European Linux journal Linux Format and

author of the publication's PHP tutorial section. He is the

author of Red Hat Fedora 4 Unleashed (Sams) and the

online book Practical PHP Programming, available at

www.hudzilla.org .

Preface

Now installed on more than 20 million Internet domains

around the world, PHP is the undisputed king of web

programming languages. Its users cite many reasons for

deployment, such as database connectivity, powerful

extensions, and rich object-orientation, but nearly

everyone would agree that, above all, PHP is just plain easy

to use. This is the feature that continues to drive the

language forward, attracting new users and enabling

existing programmers to do more with their skills.

The release of PHP 5 has introduced many new features to

the language, making this an exciting time for the

language. Many people who had not previously considered

PHP are now finding it a good fit for their needs—the new

object-orientation system is a big plus, for example. More

importantly, many people who had a large investment in

PHP 4 are trying to migrate their code to the new release

with minimum breakage. Fortunately for all of us, it's not

too hard to retain backward compatibility, and it's very

easy to take advantage of the many new features.

So, welcome to PHP. I think you'll find it a fun, interesting,

and flexible language that might finally disprove the old

saying, "Cheap, good, on time: choose any two."

Audience

This book has been designed to be of maximum use for

existing PHP developers looking for a complete, compact,

and portable reference guide to the language. If this is

your first time using PHP, but you have experience using

similar languages such as Perl, Python, or C, then you

should be able to treat the book as a learning guide.

As any PHP programmer will tell you, the online PHP

manual is of a very high standard. The aim of this book is

not to compete with or replace the online manual.

Although this book is designed to stand alone, you will find

the topic grouping, tips, and examples here complement

the online guide.

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