In through php_info() where the WSDL cache is held (/tmp), but I don\'t necessarily know if it is safe to delete all files starting with WSDL.
php_info()
/tmp
Edit your php.ini file, search for soap.wsdl_cache_enabled and set the value to 0
php.ini
soap.wsdl_cache_enabled
0
[soap] ; Enables or disables WSDL caching feature. ; http://php.net/soap.wsdl-cache-enabled soap.wsdl_cache_enabled=0