PHP and MySQL Web development (Original book 3rd edition) preface _php Tutorial

Objective:
Welcome to the world of PHP and MySQL Web development. This book describes the essence of our practical experience with PHP and MySQL. PHP and MySQL are the two most popular web development tools today.

Why do you study this book?
This book will show you how to create an interactive Web site, from the simplest order form to a complex, secure e-commerce site. Also, readers will learn how to implement it using open source technology.
This book is intended for readers who have already learned the basics of HTML and have previously used some modern programming languages for program development, but this does not require the reader to do Internet programming or use relational databases. If you are an entry-level programmer, you will find this book useful, but you may need to take a longer time to absorb and digest it. We try not to omit any basic concepts, but we are very brief when we introduce these basic concepts. A typical reader of this book is the person who wants to master PHP and MySQL and commit to creating large or e-commerce type Web sites. Some readers may have used another web development language, and if so, it is easier to master the content of the book.
The reason we're writing the 1th edition of this book is that we're tired of looking for books that are just basic PHP function references. Those books are useful, but when your boss or client says, "Get me a shopping cart quickly," Those books can't help you. We try to make every example in this book useful. Many of the sample code can be used directly on the Web site, and most code can be used directly if it is modified slightly.

What you will learn from using this book
after you have studied this book, readers will be able to create useful dynamic Web sites. If readers have already created Web sites using normal HTML, they will be aware of the limitations of this approach. The static content of a pure HTML Web site can only be static. The content will not change unless it is specifically updated. Users are also unable to interact with the site in any form.
using one programming language (for example, PHP) and a database (for example, MySQL), you can create a dynamic site: You can customize the site and include real-time information in the site.
In this book, we have spent a lot of effort to introduce practical applications. Let's start with a simple online ordering system and then introduce different parts of PHP and MySQL.
We will discuss the e-commerce and security aspects associated with creating a useful web site, and describe how to use PHP and MySQL to implement these aspects.
in the final part of this book, we'll show you how to implement real-world projects and work with readers to design, plan, and build user authentication and personalization, shopping carts, content management systems, Web-based e-mail, mailing list managers, web forums, PDF document generation, Use XML and SOAP to connect to projects such as Web services.
These items can be used directly or can be modified to meet the actual needs of the reader. We chose these projects because we believe that these 8 projects are the most common when programmers create Web-based applications. This book can also help readers achieve their goals if their needs are different.

What is PHP
PHP is a server-side scripting language that is specifically designed for the web. In an HTML page, you can embed PHP code that executes every time the page is accessed. The PHP code is interpreted in the Web server and generates additional output that the HTML or visitor sees.
PHP appeared in 1994, initially just Rasmus Lerdorf a person's work. Some other geniuses have improved the language, and it has undergone four very important rewriting to become the widely used, mature PHP we see today. by August 2004, PHP had been installed in the global 1700多万个 site domain, and the number was growing rapidly. Visit. Enter an ISBN (0-672-32672-8) or book title in the search box to find a message in this book.
We want readers to like this book and as much as we can about PHP and MySQL as we start using these products. It's really a pleasure to use them. Soon, readers will be able to join hundreds of web developers and, like them, use these robust and powerful tools to create dynamic, real-time web sites.

Thanks
We thank the editorial team of Sams Company for their hard work. We would like to pay special tribute to Shelley Johnston, without her input and patience, there is no possibility of a book to be published. We would also like to thank Israel Denis Jr and Chris Newman for their contribution to this book.
We are very grateful for the work done by PHP and the MySQL development team. Their work has made our writing easier.
We would like to thank Adrian Close in the 1998 esec that "you can use PHP to implement them." He said that we would like PHP, and now it seems he is right.
Finally, we would like to thank our families and friends for their tolerance of our "isolation" in writing this book. Thanks in particular to the support of our family members: Julie, Robert, Martin, Lesley, Adam, Paul, Archer and Barton.

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