php怎么获取真实IP-PHP Tutorial-php.cn

php怎么获取真实IP

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Release： 2016-06-13 11:15:48

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php如何获取真实IP
试了网上很多代码都不行，但是ip138每次都能显示我的真实ip。特求各位大侠支招。

比如我用一般的php获得的我的ip地址是：60.55.8.229 - 浙江宁波

但是ip38.com获取的我的IP地址是：[42.196.192.67] 来自：上海市长城宽带

ip138才是正确的。

我在医院里测试也是这样，自己的php代码获取的IP是浙江杭州

但是ip138却能获得我的真实ip，上海交通大学

我现在用的PHP代码如下：

function GetIP(){ <br />if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) <br />$ip = getenv("HTTP_CLIENT_IP"); <br />else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) <br />$ip = getenv("HTTP_X_FORWARDED_FOR"); <br />else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) <br />$ip = getenv("REMOTE_ADDR"); <br />else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) <br />$ip = $_SERVER['REMOTE_ADDR']; <br />else <br />$ip = "unknown"; <br />return($ip); <br />} <br />echo GetIP();

Copy after login

------解决方案--------------------
這是我的方法:

Function curIp(){<br />		$ip='';<br />		IF(Getenv('HTTP_CLIENT_IP') And StrCaseCmp(Getenv('HTTP_CLIENT_IP'),'unknown')){<br />			$ip=Getenv('HTTP_CLIENT_IP');<br />		}ElseIF(Getenv('HTTP_X_FORWARDED_FOR') And StrCaseCmp(Getenv('HTTP_X_FORWARDED_FOR'),'unknown')){<br />			$ip=Getenv('HTTP_X_FORWARDED_FOR');<br />		}ElseIF(Getenv('REMOTE_ADDR')And StrCaseCmp(Getenv('REMOTE_ADDR'),'unknown')){<br />			$ip=Getenv('REMOTE_ADDR');<br />		}ElseIF(isset($_SERVER['REMOTE_ADDR']) And $_SERVER['REMOTE_ADDR'] And StrCaseCmp($_SERVER['REMOTE_ADDR'],'unknown')){<br />			$ip=$_SERVER['REMOTE_ADDR'];<br />		}Else{<br />			$ip='127.0.0.1';<br />		}<br />		Return $ip;<br />	}

Copy after login

------解决方案--------------------
function real_ip()
{
static $realip = NULL;

if ($realip !== NULL)
{
return $realip;
}

if (isset($_SERVER))
{
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);

/* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
foreach ($arr AS $ip)
{
$ip = trim($ip);

if ($ip != 'unknown')
{
$realip = $ip;

break;
}
}
}
elseif (isset($_SERVER['HTTP_CLIENT_IP']))
{
$realip = $_SERVER['HTTP_CLIENT_IP'];
}
else
{
if (isset($_SERVER['REMOTE_ADDR']))
{
$realip = $_SERVER['REMOTE_ADDR'];
}
else
{
$realip = '0.0.0.0';
}
}
}
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');
}
}
$onlineip = null;
preg_match("/[\d\.]{7,15}/", $realip, $onlineip);
$realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';

return $realip;
}
------解决方案--------------------