I have a WAMP (windows (7), apache, mysql, php) stack all setup and running. All is well and it is working and running as expected. I use the machine primarily for development however it is accessible to the outside world. Anyways..
I recently come cross a client with a pre-existing SaaS product where cURL, SOAP, and the like are used. I drop there system onto my server and a bit of jumping around to set it up, get it setup, start plugging away at things to only come across a section where I am getting
Fatal error: Class 'SoapClient' not found
Naturally my first jump was i forgot to uncomment
extension=php_soap.dll
Which was true, so I did un-comment it, save the file, then restart the server. However the problem still exists (so I tried even rebooting), now I am stuck as I am not a guru with WAMP/LAMP stacks and configuring them I can only just get around them as needed til now.
Do you have a php_soap.dll in your php/ext/ folder?
This might be a little late now, But I had the similar problem with wamp, and it was because php.ini was different in apache and in cli mode, there was one in apache folder which had php_soap.dll included but the one in php folder which cli was using didn't have it. I add it to the other one and the problem was solved
To find the loaded php.ini file, load the phpinfo() page.
Navigate to that path and open php.ini in notepad and search for php_soap.dll in it.
Uncomment this line and save the file before restarting the server.
You've probably checked this, but what version of PHP are you using? SoapClient only available after 5.0.1
Uncommenting it in php.ini didn't work. I had to uncomment it in php.ini-development and php.ini-production. They were all in C:/BitNami/wampstack-.../php
来源：https://stackoverflow.com/questions/6760716/wamp-stack-php-fatal-error-class-soapclient-not-found