How to get the client IP address in PHP [duplicate]

Answer 1

Here is the one-liner version getting the client's IP address:

$ip = @$_SERVER['HTTP_CLIENT_IP'] ?: @$_SERVER['HTTP_X_FORWARDED_FOR'] ?: @$_SERVER['REMOTE_ADDR'];

Notes:

• By using @, it suppresses the PHP notices.

• Value from HTTP_X_FORWARDED_FOR may consist multiple addresses separated by comma, so if you prefer to get the first one, you can use the following method:

  current(explode(',', @$_SERVER['HTTP_X_FORWARDED_FOR']))