Websocket via xinetd an php Script:

apt install xinetd

in etc/xinetd.d eine Datei names weksocket mit folgenden Inhalt erstellen:

  service websocket_php_service
  {
    disable     = no
    socket_type = stream
    protocol    = tcp
    wait        = no
    user        = www-data
    server      = /usr/bin/php
    server_args = /pfad_zum_zu_startenden_script/script.php
    port        = 3000
  }

systemctl restart xinetd


entsprechender Eintrag in der nginx.conf im Serverblock: 

    location /ws {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
    }