Home arrow PHP arrow Page 6 - Converting XML Into a PHP Data Structure

Converting XML Into a PHP Data Structure

Dante explains how to convert data from XML to the more PHP friendly arrays and arrays in arrays so that it can be used easily in your code.

Author Info:
By: Dante Lorenso
Rating: 4 stars4 stars4 stars4 stars4 stars / 60
January 06, 2003
  1. · Converting XML Into a PHP Data Structure
  2. · A Look at the XML File Structure
  3. · Using an Array as a Data Structure
  4. · Make PHP Do The Hard Work
  5. · Watching the XML Parsing Events: Callback Functions
  6. · Building the Array Tree
  7. · The Completed XMLToArray Class
  8. · How to Use the Class
  9. · Conclusion

print this article

Converting XML Into a PHP Data Structure - Building the Array Tree
(Page 6 of 9 )

At this point, we have a functioning class that will parse an XML document and fire events.

What we'll need to do now is modify the event handlers to build our array tree using the array structure we defined above.

A simple algorithm for developing this code goes as follows:
  • Each time a 'START' event is called, build a new node. The node we are building is our array structure, but you might decide to build a Node object using your own custom objects. The START event contains the name and attributes of the tag. After building the node, push the new node onto a class-level stack so that we can add data and sub-nodes from the 'DATA' or 'END' elements later.
  • Each time a 'DATA' event is called, append the text to the end of the text inside the node which is currently on top of our stack.
  • Each time an 'END' event is called, we need to pop a node off the stack, finalize the node, and add it as a subnode to the node which is now on the top of the stack. This completes the depth-first build of our tree structure.

Before we start parsing the XML, it might help to push a 'root' node onto an empty stack. This way, when the parsing is completed, we expect to find only the root node remaining on the stack with all the subnodes built beneath it.
blog comments powered by Disqus

- Removing Singletons in PHP
- Singletons in PHP
- Implement Facebook Javascript SDK with PHP
- Making Usage Statistics in PHP
- Installing PHP under Windows: Further Config...
- File Version Management in PHP
- Statistical View of Data in a Clustered Bar ...
- Creating a Multi-File Upload Script in PHP
- Executing Microsoft SQL Server Stored Proced...
- Code 10x More Efficiently Using Data Access ...
- A Few Tips for Speeding Up PHP Code
- The Modular Web Page
- Quick E-Commerce with PHP and PayPal
- Regression Testing With JMeter
- Building an Iterator with PHP

Watch our Tech Videos 
Dev Articles Forums 
 RSS  Articles
 RSS  Forums
 RSS  All Feeds
Write For Us 
Weekly Newsletter
Developer Updates  
Free Website Content 
Contact Us 
Site Map 
Privacy Policy 

Developer Shed Affiliates


© 2003-2018 by Developer Shed. All rights reserved. DS Cluster - Follow our Sitemap
Popular Web Development Topics
All Web Development Tutorials