php获取ip地址

function getIp()
    {

        if(!empty($_SERVER["HTTP_CLIENT_IP"]))
        {
            $cip = $_SERVER["HTTP_CLIENT_IP"];
        }
        else if(!empty($_SERVER["HTTP_X_FORWARDED_FOR"]))
        {
            $cip = $_SERVER["HTTP_X_FORWARDED_FOR"];
        }
        else if(!empty($_SERVER["REMOTE_ADDR"]))
        {
            $cip = $_SERVER["REMOTE_ADDR"];
        }
        else
        {
            $cip = '';
        }
        preg_match("/[\d\.]{7,15}/", $cip, $cips);
        $cip = isset($cips[0]) ? $cips[0] : 'unknown';
        unset($cips);

        return $cip;
    }

获取ip对应的地址

$info_ip = @file_get_contents('http://ip-api.com/json/'.$ip.'?lang=zh-CN');
$info_ip = json_decode($info_ip,true);