获取IP地址的五种方法

2016-09-08 14:43 袁叶子阅读(1903) 评论(0) 编辑收藏举报

<?php

//方法1：

$ip = $_SERVER["REMOTE_ADDR"];
echo $ip;

//方法2：
$user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];
$user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];
echo $user_IP;

//方法3：
function getRealIp()
{
    $ip=false;
    if(!empty($_SERVER["HTTP_CLIENT_IP"])){
        $ip = $_SERVER["HTTP_CLIENT_IP"];

}

if (!empty($_SERVER[\'HTTP_X_FORWARDED_FOR\'])) {
        $ips = explode (", ", $_SERVER[\'HTTP_X_FORWARDED_FOR\']);
        if ($ip) { array_unshift($ips, $ip); $ip = FALSE; }
        for ($i = 0; $i < count($ips); $i++) {
            if (!eregi ("^(10│172.16│192.168).", $ips[$i])) {
                $ip = $ips[$i];
                break;
            }
        }
    }
    return ($ip ? $ip : $_SERVER[\'REMOTE_ADDR\']);
}

echo getRealIp();

//方法4：
if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"])
{
    $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
}
elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"])
{
    $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
}
elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"])
{
    $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];
}
elseif (getenv("HTTP_X_FORWARDED_FOR"))
{
    $ip = getenv("HTTP_X_FORWARDED_FOR");

}

elseif (getenv("HTTP_CLIENT_IP"))
{
    $ip = getenv("HTTP_CLIENT_IP");
}
elseif (getenv("REMOTE_ADDR"))
{
    $ip = getenv("REMOTE_ADDR");
}
else
{
    $ip = "Unknown";
}

echo $ip ;

//方法5：
if(getenv(\'HTTP_CLIENT_IP\')) {
    $onlineip = getenv(\'HTTP_CLIENT_IP\');
} elseif(getenv(\'HTTP_X_FORWARDED_FOR\')) {
    $onlineip = getenv(\'HTTP_X_FORWARDED_FOR\');
} elseif(getenv(\'REMOTE_ADDR\')) {
    $onlineip = getenv(\'REMOTE_ADDR\');
} else {
    $onlineip = $HTTP_SERVER_VARS[\'REMOTE_ADDR\'];
}

echo $onlineip;