PHP获取客户端ip的五种方式

方法一

1 <?php                                                                                                                                 
2 $ip = $_SERVER["REMOTE_ADDR"];
3 echo $ip;

方法二

<?php
$user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];
$user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];
echo $user_IP;

方法三

<?php
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();

方法四

<?php
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 ;

方法五

<?php
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;

这是淘宝提供的一个查询ip地区的一个接口

$url="http://ip.taobao.com/service/getIpInfo.php?ip=".$ip;
$ip=json_decode(file_get_contents($url));   
if((string)$ip->code=='1'){return false;
}
$data = (array)$ip->data;