我需要修改我的PHP代码输出结果在新行

I want to save my data in my text on new line. But I don't know how because I get ip address with IF and else. Please help me !

$File = "newfile2.txt"; 
$Handle = fopen($File, 'a');
//whether ip is from share internet
if (!empty($_SERVER['HTTP_CLIENT_IP'] ))   
  {
    $ip_address = $_SERVER['HTTP_CLIENT_IP'];
  }
//whether ip is from proxy
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))  
  {
    $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
  }
//whether ip is from remote address
else
  {
    $ip_address = $_SERVER['REMOTE_ADDR'];
  }
echo $ip_address;
fwrite($Handle, $ip_address);

Give EOL a try.

fwrite($Handle, $ip_address . PHP_EOL);