如何在Nginx中使用PHP设置websockets？

我看过这个教程,但不能让它工作

https://www.sanwebe.com/2013/05/chat-using-websocket-php-socket

已将三个文件复制到www目录的根目录中

的index.PHP
/jquery-3.1.1.js
/websocket/server.PHP

在index.PHP中,我更改了URI

var wsUri = "wss://domain.com/websocket/server.PHP";

在Nginx中我添加了这个

http {
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }
    server {
        location /websocket/ {
            proxy_pass https://domain.com:9000/websocket/server.PHP;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
        }
    }
}

http://nginx.org/en/docs/http/websocket.html

启动websocket服务器

PHP -q /var/www/websocket/server.PHP

聊天位于https://domain.com/chat.PHP并加载,但在聊天窗口中出现此错误发生错误 – 连接已关闭

还试图通过此工具连接,但得到此错误

http://www.websocket.org/echo.html

ERROR: undefined
DISCONNECTED

如果通过浏览器请求

wss://domain.com/websocket/server.PHP


ERR_DISALLOWED_URL_SCHEME