PHP WDDX: Understanding Anatomy of WDDX

Web Distributed Data Exchange Step By Step tutorial - Part 2: Not like WSDL, anatomy of WDDX is more simple. It is simple to understand. The structure of WDDX documents has remained consistent since 1999 with the release of WDDX 1.0. You may see this document like a DTD.

When we talk about WDDX document, we must talk about WDDX Packets. WDDX use packets to exchange data. Packets are simple XML documents passing data in WDDX format. Look following anatomy:

This is anatomy of WDDX without notes or comments:

<wddxPacket version='1.0'>
  <header />
    <!-- WDDX data -->

This is anatomy of WDDX with notes or comments:

<wddxPacket version='1.0'>
	  It contains a comment
    <!-- WDDX data -->

You can build this structure manually using an extension such as DOM or XMLWriter. But, PHP have wddx extension. So, you don't need much effort to create WDDX document.

Series this article:
PHP WDDX: Introduction
PHP WDDX: Understanding Anatomy of WDDX
PHP WDDX: Understanding Data Elements
PHP WDDX: Understanding Simple Data Type
PHP WDDX: Using Array Elements
PHP WDDX: Struct Element
PHP WDDX: Recordset Element
PHP WDDX: Simple Serialization Using PHP function
PHP WDDX: Complex Serialization
PHP WDDX: Unserializing Data
PHP WDDX: Creating Web Service Server
PHP WDDX: Creating Web Service Client

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