PHP Persistent connections

nginx.conf

upstream webservice-pers {
  server webservices.remoteserver.com:80 max_fails=0 fail_timeout=30s;
  keepalive 1024;
}

server {
  listen   8080;
  server_name  webservices.localserver.com;
  
  location / {
    proxy_http_version 1.1;
    proxy_set_header Connection "";
    proxy_set_header Host "webservices.remoteserver.com";
    proxy_pass https://webservice-pers;
  }
}

So, PHP can use the persistent connection opened by nginx or nginx routes traffic to/from a PHP server?