PHP gets client and server-side IP

IP variables for the client:

$_server[' REMOTE_ADDR ': Client IP, may also be proxy IP

$_server[' http_client_ip ': Proxy-side IP, may exist, may also be forged

$_server[' http_x_forward_for ': The ID that the user uses on which IP, may exist, or may be forged

IP variables on the server side:

$_server[' server_name ': You need to use the function gethostname () to get it, whether it is the server side or the client can display normally.

$_server[' server_addr ': Server-side IP address, test IP address on server side, test normal on client

Getnev get the environment variables for the system:

Example:

<?phpclass GetIP () {     function ClientIP () {    $cIP = getenv ($_server[' remote_addr ']);    $cIP 1 = getenv ($_server[' http_x_forword_for ');    $cIP 2 = getenv ($_server[' http_client_ip ');   $cIP 1? $cIP = $cIP 1?null;    $cIP 2? $cIP = $cIP 2?null;   return $cIP;}     function ServerIP () {       return gethostbyname ($_server[' server_name ');}} $getIP  = new GetIP ();   $clientIp = Getip::clientip ();   $serverIp = Getip::serverip ();       ? >

　　

PHP gets client and server-side IP