What do endpoint, Disco, and WSDL do in Php-webservice?

Endpoint: http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx
The URI address of the Web service, after which you will see a description of the related class, a list of methods, and a method description for the Web service.

Disco: Http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx?disco
The Web service can be found through this. That is to take advantage of a discovery mechanism in Web service Discovery Disco.

WSDL: http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx?wsdl
The descriptive language of the Web service. That is, Web Services Description Language. The methods and properties used to describe your Web service definition, the Binding Protocol section, port ports, and service URIs.

Appendix:

PHP Build webservice:http://www.cnblogs.com/johnabc/p/3552308.html

What do endpoint, Disco, and WSDL do in Php-webservice?