Wsdl2(Java|Php) rocks. It’s not #REST but #SOAP w/ as little pain as possible. Know (my) REST Describe & Compile tool => http://tr.im/pVmH ?
Wsdl2Php-Interpreter (http://tinyurl.com/pvj3dr) is a decent tool for #SOAP in #PHP. Had to patch it for #APIlity for extending SoapClient.
#PHP5’s native #SOAP isn’t bad. Where it is, you can always extend the SoapClient class. 1 elem arrays are a good feature: http://tr.im/pS7j