function FindProxyForURL(url, host)
{
  if (isPlainHostName(host))
    return "DIRECT";
  if ((dnsDomainIs(host, ".example.com")) && !localHostOrDomainIs(host, "www.example.com"))
    return "DIRECT";
  else
    if ((dnsDomainIs(host, ".example.net")) && localHostOrDomainIs(host, "foo.example.net"))
      return "DIRECT";
    if ((dnsDomainIs(host, ".example.net")) && localHostOrDomainIs(host, "bar.example.net"))
      return "DIRECT";
    if (localHostOrDomainIs(host, "192.168.0.2"))
      return "DIRECT";
    if (localHostOrDomainIs(host, "192.168.1.3"))
      return "DIRECT";
  return "PROXY 192.168.100.6:8080";
}

mysql_connect('localhost:/tmp/mysql.sock', 'userid', 'password');