getIP 枫

function getIP()
 {
 if (isset($_SERVER)) {
 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
 $realip = $_SERVER['HTTP_X_FORWARDED_FOR'];
 } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
 $realip = $_SERVER['HTTP_CLIENT_IP'];
 } else {
 $realip = $_SERVER['REMOTE_ADDR'];
 }
 } else {
 if (getenv("HTTP_X_FORWARDED_FOR")) {
 $realip = getenv( "HTTP_X_FORWARDED_FOR");
} elseif (getenv("HTTP_CLIENT_IP")) {
$realip = getenv("HTTP_CLIENT_IP");
} else {
$realip = getenv("REMOTE_ADDR");
}
}
return $realip;
}