by Nginx server redirect all HTTP request to another site

by Nginx server redirect all HTTP request to another site

example:
from http://www.def.com/test/?x=1&y=1
to http://www.abc.com/test/?x=1&y=1

from http://www.def.com/index.php/test/?x=1&y=1
to http://www.abc.com/test/?x=1&y=1

server {
  listen 1.1.1.1:80;
  server_name .def.com;
  set $root_path '/home/user/www/public';
  root $root_path;
  if ($request_uri ~* "^\/index\.php(.*)") {
    return 301 http://www.abc.com$1; #remove index.php
  } 
  return         301 http://www.abc.com$request_uri;
}