wsdl failed to load external entity

For a long time did not write blog, usually the content recorded in the impression notes. But I was plagued by this problem for a long time, the degree Niang, Google turned over, most of the answers can not solve my problem. The details of the

PHP when using the SOAP protocol interface, often encounter the following problems, not unsuccessful, but occasionally unsuccessful, it is puzzling!err:soap-error:parsing wsdl:couldn ' t load from ' HTTP://WWW.XXXXX.COM/MEMBER/MEMBER_SYNC.PHP?WSDL ':

PHPhttps accesses webservice. In the test environment, PHP accesses webservice over http. everything works normally. But the production environment's webservice is https, and the program displays SOAP-ERROR: ParsingWSDL: Couldntloadfrom *** Service?

In the test environment, PHP accesses webservice over http. Everything works normally. But the production environment's webservice is https, and the program displays SOAP-ERROR: Parsing WSDL: Couldn't load from 'https: // ***/Service? Wsdl ':

The first time I made a soap interface, something went wrong. Warning: SoapClient (http: // 192.168.1.198: 8008/) [function. SoapClient-SoapClient]: failed to open stream: HTTP request failed! HTTP/1.1 500 Internal Server Error In C: \ wamp \ www

Warning: Soapclient::soapclient (http://192.168.1.198:8008/) [function. Soapclient-soapclient]: Failed to open stream:http request failed! http/1.1 Internal Server Error Inch C:\wamp\www\ITServer_v1.21n\include\ETSoap.phpOn line - Warning: