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Using PHP With XML (part 2)
PHP's DOM parser offers a simpler - though slower - alternative to the SAX parsing technique.

| Climbing A Tree |

In the first part of this article, I said that there were two approaches to parsing an XML document. SAX is one; the other uses the DOM to build a tree representation of the XML data structures in the document, and then offers built-in methods to navigate through this tree. Once a particular node has been reached, built-in properties can be used to obtain the value of the node, and use it within the script.

PHP4 comes with support for this "DOM parser" as well, although you may need to recompile your PHP binary with the "--with-dom" parameter to activate it. Windows users get a free ride, since a compiled binary is included with their distribution; however, they will still need to activate the extension in the "php.ini" configuration file.

Over the next few pages, I'm going to take a look at PHP's DOM functions, illustrating an alternative method of parsing XML data. I'll also attempt to duplicate the previous examples, marking up books and recipes with HTML tags, in order to demonstrate how either technique can be used to achieve the same result. Finally, I'll briefly discuss the pros and cons of the SAX and DOM approaches, and point you to some links for your further education.

Let's get started, shall we?


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!


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