今天给出一个比较完善的获取IP地址的算法，作为一个记录：
/**
* 获取客户端IP * @return string $ipaddress 客户端IP */ public static function IP() { $ip = ”; if (isset($_SERVER[‘HTTP_CLIENT_IP’]) && $_SERVER[‘HTTP_CLIENT_IP’]) { $ip = $_SERVER[‘HTTP_CLIENT_IP’]; } elseif (isset($_SERVER[‘HTTP_X_FORWARDED_FOR’]) && $_SERVER[‘HTTP_X_FORWARDED_FOR’]) { $ip = $_SERVER[‘HTTP_X_FORWARDED_FOR’]; $ip = explode(‘,’, $ip); $ip = trim($ip[0]); } elseif (isset($_SERVER[‘HTTP_X_FORWARDED’]) && $_SERVER[‘HTTP_X_FORWARDED’]) { $ip = $_SERVER[‘HTTP_X_FORWARDED’]; } elseif (isset($_SERVER[‘HTTP_FORWARDED_FOR’]) && $_SERVER[‘HTTP_FORWARDED_FOR’]) { $ip = $_SERVER[‘HTTP_FORWARDED_FOR’]; } elseif (isset($_SERVER[‘HTTP_FORWARDED’]) && $_SERVER[‘HTTP_FORWARDED’]) { $ip = $_SERVER[‘HTTP_FORWARDED’]; } elseif (isset($_SERVER[‘REMOTE_ADDR’]) && $_SERVER[‘REMOTE_ADDR’]) { $ip = $_SERVER[‘REMOTE_ADDR’]; } else { $ip = ”; } return $ip; } Be the First to comment.