I am writing a simple web service interface for my own web photo album. I did Google search. You will tell me, PHP5 supports SOAP. Too bad, my web host company is still using PHP4(well, this is an option upgrade to PHP5, I still have not time to do that). Major options for PHP4, that is PEAR SOAP and NuSoap. I have used NuSoap before.Just I have checked their project page, the latest version is Aug ,2005. That seems to a bit old. Moreover, I wish to have a look other libraries too. Tonight I have a look on PEAR SOAP. That is fairly good. I have created an echo string application with my .Net 1.1. But that would hard for myself, because I am using third party webhost. PEAR SOAP required HTTP Request and NET Socket too. That would be a bit hassles to load them all into the live site. Well, the final decision is sticked with the old choice.