What is the best SOAP implementation for PHP/Apache? I wish to 
create some web services written in PHP which people can access 
via SOAP. I am also interested in a good SOAP client for PHP, but 
mainly need a server. 
 
By "good" I mean simple and easy to use, and reliable. It doesn't 
have to support anything fancy or weird. I do want to be able to handle 
requests which come in as either vanilla HTTP GET or POST requests, as well. 
 
I have seen the Microsoft IIS implementation of .NET SOAP  which 
can answer to both a real SOAP call with envelope and headers, as well as  
to requests which just look like /foo?a=3&b=4, i.e., they handle 
traditional HTTP GET or POST requests. This makes it easier for 
other clients to get my services, if they don't support SOAP yet.