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优化 get_client_ip 函数的adv模式的处理 #434

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优化 get_client_ip 函数的adv模式的处理 #434

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57 changes: 44 additions & 13 deletions ThinkPHP/Common/functions.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1644,6 +1644,45 @@ function load_ext_file($path)
}
}

/**
* 判断一个ip是否是内网ip
* A类 10.0.0.0--10.255.255.255
* B类 172.16.0.0--172.31.255.255
* C类 192.168.0.0--192.168.255.255
* @param string $ip
* @return boolean
*/
function is_inner_ip($ip)
{
if ('127.0.0.1' === $ip) {
return true;
}
list($i1, $i2, $i3, $i4) = explode('.', $ip, 4);
return ($i1 == 10 || ($i1 == 172 && 16 <= $i2 && $i2 < 32) || ($i1 == 192 && $i2 == 168));
}

/**
* 获取一堆ip里面的第一个外网ip，如果没有外网ip，返回最后一个合法的ip，否则返回 unknown
* @param string $iplist
* @return string
*/
function get_first_outerip($iplist)
{
$iparr = preg_split('/;|,|\s/', $iplist);
$ip = 'unknown';
foreach ($iparr as $v) {
$v = trim($v);
if (false === ip2long($v)) {
continue;
}
$ip = $v;
if (!is_inner_ip($ip)) {
break;
}
}
return $ip;
}

/**
* 获取客户端IP地址
* @param integer $type 返回类型 0 返回IP地址 1 返回IPV4地址数字
Expand All @@ -1659,19 +1698,11 @@ function get_client_ip($type = 0, $adv = false)
}

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]);
}

$ip = trim($arr[0]);
} elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ip = $_SERVER['REMOTE_ADDR'];
}
$ip = $_SERVER['HTTP_X_FORWARDED_FOR']
.' '.$_SERVER['HTTP_CLIENT_IP']
.' '.$_SERVER['HTTP_VIA']
.' '.$_SERVER['REMOTE_ADDR'];
$ip = get_first_outerip($ip);
} elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ip = $_SERVER['REMOTE_ADDR'];
}
Expand Down