Код:

user www;
worker_processes 3;

pid /var/run/nginx.pid;

events {
  worker_connections 1024;
}
http {
  include mime.types;
  default_type application/octet-stream;
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  server_names_hash_max_size 2048;
  server_names_hash_bucket_size 128;

#server1.com
  server {
  listen 80;
  server_name server1.com;

  charset utf8;
  client_max_body_size 25m;

  location / {
  root /usr/local/www/web1;
  index index.html;
  }

  location /phpmyadmin {
  alias /usr/local/www/web2/;
  index index.html index.php;
  }

  location ~* \.php$ {
  rewrite ^/phpmyadmin(/.+)$ $1 break;
  fastcgi_pass 127.0.0.1:9000;
  fastcgi_index index.php;
  fastcgi_param SCRIPT_FILENAME /usr/local/www/web2$fastcgi_script_name;
  include fastcgi_params;
  }
  }
}