Symfony env depending on a cookie

help.md

Add this URL as a bookmark, with 'dev' replaced with the environment to switch to. Repeat for each env.

javascript:(/** @version 0.5.2 */function() {document.cookie='env=dev;path=/;';})()

nginx.conf

server {
  location / {
      set $env "dev";
      if ($http_cookie ~* "env=([^;]+)(?:;|$)") {
        set $env $1;
      }
      fastcgi_param ENVIRONMENT $env;
    }
  }
}