New website's feature: Check HTTP/HTTPS/Sock4/Sock5 proxy

Hi everyone! I have add the new feature for website: check proxy (proxy has username/password also supported). This feature intergrated into check key page. The proxy format is: "ip:port" or "ip:port:username:password". Let try to see and tell me how it works. This is the url: https://kichhoat24h.com/pidms Thank you very much!