请问下,用PHP获取浏览当前用户的公网IP地址,用什么方法啊?

Question

请问下,用PHP获取浏览当前用户的IP地址,用什么方法啊?
我查了一下,都说是用$_SERVER['REMOTE_ADDR'],但是这个获取的结果并不是公网IP呀.

Answer 1

public function ip($type = 0, $adv = true) { $type = $type ? 1 : 0; static $ip = null; if (null !== $ip) { return $ip[$type]; } if ($adv) { if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); $pos = array_search('unknown', $arr); if (false !== $pos) { unset($arr[$pos]); } $ip = trim(current($arr)); } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (isset($_SERVER['REMOTE_ADDR'])) { $ip = $_SERVER['REMOTE_ADDR']; } } elseif (isset($_SERVER['REMOTE_ADDR'])) { $ip = $_SERVER['REMOTE_ADDR']; } // IP地址合法验证 $long = sprintf("%u", ip2long($ip)); $ip = $long ? [$ip, $long] : ['0.0.0.0', 0]; return $ip[$type]; } 直接拿去用

Answer 2

依次检测以下请求头，如果有值就返回 REMOTE_ADDR X-FORWARDED-FOR X-REAL-IP HTTP_CLIENT_IP