检查IP地址是否为私有 [英] Check if an IP address is private
本文介绍了检查IP地址是否为私有的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想检查IP地址是否在专用网络中。它不起作用。
I like to check if an IP address is in a private network. It doesn't work.
我的代码:
<?php
$ip = $_SERVER['REMOTE_ADDR'];
function _isPrivate($ip)
{
$i = explode('.', $ip);
if ($i[0] == 10) {
return true;
} else if ($i[0] == 172 && $i[1] > 15 && $i[1] < 32) {
return true;
} else if ($i[0] == 192 && $i[1] == 168) {
return true;
}
return false;
}
?>
另一个:
<?php
$ip = $_SERVER['REMOTE_ADDR'];
function _isPrivate($ip)
{
$ip = ip2long($ip);
$net_a = ip2long('10.255.255.255') >> 24;
$net_b = ip2long('172.31.255.255') >> 20;
$net_c = ip2long('192.168.255.255') >> 16;
return $ip >> 24 === $net_a || $ip >> 20 === $net_b || $ip >> 16 === $net_c;
}
?>
非常感谢任何帮助,谢谢!
Any help would be much appreciated, thanks!
推荐答案
function ip_is_private ($ip) {
$pri_addrs = array (
'10.0.0.0|10.255.255.255', // single class A network
'172.16.0.0|172.31.255.255', // 16 contiguous class B network
'192.168.0.0|192.168.255.255', // 256 contiguous class C network
'169.254.0.0|169.254.255.255', // Link-local address also refered to as Automatic Private IP Addressing
'127.0.0.0|127.255.255.255' // localhost
);
$long_ip = ip2long ($ip);
if ($long_ip != -1) {
foreach ($pri_addrs AS $pri_addr) {
list ($start, $end) = explode('|', $pri_addr);
// IF IS PRIVATE
if ($long_ip >= ip2long ($start) && $long_ip <= ip2long ($end)) {
return true;
}
}
}
return false;
}
参见 http://mebsd.com/coding-snipits/check-private-ip-function-php.html
您可能还想查看私人地址空间此处
You might also want to check out about the private address spaces here
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