I would like to learn web services (SOAP, WSDL), and I am primarily programming in PHP. Can you suggest any book that uses PHP to teach these concepts?
try W3SCHOOLS, first you can get started quickly, WSDL and SOAP
O'Reilly PHP Cookbook contains two chapters with good examples.
Ch 14 - Using Web ServicesCh 15 - Creating Web Services
http://www.packtpub.com/toc/php-oracle-web-development-data-processing-security-caching-xml-web-services-and-ajax-table-cont#chapter_9 SOAP- SOAP, .
Take a look at this nice book: “ Zend Framework Web Services ” It covers SOAP, RPC, REST, JSON-RPC, and a number of other related development topics, including testing web services.