Update:Fixed warning

src/Library/IP.php

@@ -30,11 +30,12 @@ class IP
 	 */
 	public function getIP()
 	{
+		$ip = "";
 		if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
 			$ip = $_SERVER['HTTP_CLIENT_IP'];
 		} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
 			$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
-		} else {
+		} else if(!empty($_SERVER['REMOTE_ADDR'])) {
 			$ip = $_SERVER['REMOTE_ADDR'];
 		}
 		return $ip;