Overview
Open source has brought a lot more than Linux to the computing world. It has also given us PHP and
MySQL. According to Graeme, PHP and MySQL are the world’s best combination for creating data-driven
sites. In the first installment of this three-lesson tutorial, our Kiwi guide covers everything you need to
know to begin developing database hubs. He gives instructions for installation on both Unix and Windows,
and then goes on to show some simple scripts that will insert information into a database and display that
data on a Web page.
Lesson 2 covers more PHP/MySQL goodies than you could probably imagine. Graeme starts by showing
while loops, then talks about the ever-useful if-else statement. But this information alone means little if
you don’t continue and see how PHP can be used with HTML forms. By the time you’ve polished off this
lesson, you’ll be able to add, edit, and remove information from your database.
In Lesson 3, Graeme shows some of the secrets that will turn your simple data-driven site into a useful
application. As he covers validation, he’ll show how to prevent users from leaving key form fields blank and
how to make sure numeric files don’t contain letters. He’ll also teach you how PHP handles includes and
functions. Plus you’ll see how these two features, when deployed together, can make the coder’s life much
easier. Graeme winds it all up with some tearful parting words and a bit of advice for the aspiring
PHP/MySQL coder.
Other PHP articles on Webmonkey:
Site Navigation with PHP
Image Creation with PHP
Threaded Discussion with PHP/MySQL
movement, Linux.
Having a massively complex RDBMS (relational database management system) is all well and good if you
know what to do with it. But perhaps you are just getting into the world of databases. You’ve read Jay’s
article and you want to put up your own data-driven Web site. But you find you don’t have the resources
or desire for an ASP server or some pricey database. You want something free, and you want it to work
with Unix.
Enter PHP and MySQL. These two make up what must be the best combination for data-driven Web sites
on the planet. You needn’t take my word for it. An unofficial Netcraft survey shows that PHP usage has
jumped from 7,500 hosts in June 1998 to 410,000 in March 1999. That’s not bad. The combination was also
awarded Database of the Year at Webcon98, where it received a lovely tiara.
MySQL is a small, compact database server ideal for small – and not so small – applications. In addition to
supporting standard SQL (ANSI), it compiles on a number of platforms and has multithreading abilities on
Unix servers, which make for great performance. For non-Unix people, MySQL can be run as a service on
Windows NT and as a normal process in Windows 95/98 machines.
PHP is a server-side scripting language. If you’ve seen ASP, you’ll be familiar with embedding code within an
HTML page. Like ASP, PHP script is processed by the Web server. After the server plays with the PHP code,
it returns plain old HTML back to the browser. This kind of interaction allows for some pretty complex
operations.
In addition to being free (MySQL does have some licensing restrictions though), the PHP-MySQL
combination is also cross-platform, which means you can develop in Windows and serve on a Unix platform.
Also, PHP can be run as an external CGI process, a stand-alone script interpreter, or an embedded Apache
module.
If you’re interested, PHP also supports a massive number of databases, including Informix, Oracle, Sybase,
Solid, and PostgreSQL – as well as the ubiquitous ODBC.
PHP supports a host of other features right at the technological edge of Internet development. These
include authentication, XML, dynamic image creation, WDDX, shared memory support, and dynamic PDF
document creation to name but a few. If that’s not enough, PHP is easy to extend, so you can roll your
own solution if you’re programming savvy.
Finally, since both efforts are collaborative in nature, there’s always plenty of support from documentation
and mailing lists. Bugs are fixed rapidly, and requests for features are always heard, evaluated, and if
feasible, implemented.
Enough talk! Let’s go over what we’re going to cover in this tutorial.
Lesson 1 is going to cover the installation of these products on both Unix and Windows systems. If you
don’t need to worry about that (you’re working on your ISP’s machine, perhaps), jump right to the first
example scripts, where the magic starts.
In Lesson 2 we’ll look at some more complex scripting goodies, including looping, form input, and sending
data from and to the database.
Lesson 3 will cover validation and techniques for making your PHP scripts smart and clean.
Let’s roll.
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