Logo         Community
The Company
Your Account
Contact Us
Using Perl With XML (part 1)
Find out how to use Perl's SAX parser to parse and convert your XML into Web-friendly HTML

| Let's Talk About SAX |

The first of these approaches is SAX, the Simple API for XML. A SAX parser works by traversing an XML document and calling specific functions as it encounters different types of tags. For example, I might call a specific function to process a starting tag, another function to process an ending tag, and a third function to process the data between them.

The parser's responsibility is simply to parse the document; the functions it calls are responsible for processing the tags found. Once the tag is processed, the parser moves on to the next element in the document, and the process repeats itself.

Perl comes with a SAX parser based on the expat library created by James Clark; it's implemented as a Perl package named XML::Parser, and currently maintained by Clark Cooper. If you don't already have it, you should download and install it before proceeding further; you can get a copy from http://wwwx.netheaven.com/~coopercc/xmlparser/, or from CPAN (http://www.cpan.org/).

I'll begin by putting together a simple XML file:

<?xml version="1.0"?>

<author>Stephen King</author>

<title>Mystic River</title>
<author>Dennis Lehane</author>

<title>The Lord Of The Rings</title>
<author>J. R. R. Tolkien</author>


Once my data is in XML-compliant format, I need to decide what I'd like the final output to look like.

Let's say I want it to look like this:

Output image

As you can see, this is a simple table containing columns for the book title, author, price and rating. (I'm not using all the information in the XML file). The title of the book is printed in italics, while the numerical rating is converted into something more readable.

Next, I'll write some Perl code to take care of this for me.

How to do Everything with PHP & MySQL
How to do Everything with PHP & MySQL, the best-selling book by Melonfire, explains how to take full advantage of PHP's built-in support for MySQL and link the results of database queries to Web pages. You'll get full details on PHP programming and MySQL database development, and then you'll learn to use these two cutting-edge technologies together. Easy-to-follow sample applications include a PHP online shopping cart, a MySQL order tracking system, and a PHP/MySQL news publishing system.

Read more, or grab your copy now!

previous page more like this  print this article  next page
In trog...
Logging With PHP
Building A Quick-And-Dirty PHP/MySQL Publishing System
Output Buffering With PHP
Date/Time Processing With PHP
Creating Web Calendars With The PEAR Calendar Class
In the hitg report...
Crime Scenes
Animal Attraction
Lord Of The Strings
In boombox...
Patience - George Michael
Think Tank - Blur
My Private Nation - Train
In colophon...
Hostage - Robert Crais
The Dead Heart - Douglas Kennedy
Right As Rain - George Pelecanos
In cut!...
American Chai
The Core
Find out how you can use this article on your own Web site!

Copyright © 1998-2018 Melonfire. All rights reserved
Terms and Conditions | Feedback