XML and PHP is a clear, concise guide to the synergies between XML and PHP, many of which are not immediately visible to intermediate developers. XML and PHP demonstrates how PHP and XML can be combined to build cutting-edge Web applications. It includes detailed explanations of PHP's XML extensions, together with illustrations of using PHP to parse, validate and transform XML markup, traverse XML data trees, exchange data between Web applications, overlay remote procedure calls over HTTP, and use free open-source tools to add new capabilities to your PHP/XML applications.