php REMOTE_ADDR之获取访客IP的代码

　　<?php
$iipp=$_SERVER[REMOTE_ADDR];
echo$iipp;
?>[/code][code]<?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;
?>

<?php
functionget_real_ip(){
$ip=false;
if(!empty($_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(^(10172.16192.168).,$ips[$i])){
$ip=$ips[$i];
break;
}
}
}
return($ip?$ip:$_SERVER[REMOTE_ADDR]);
}

echoget_real_ip();
?>

<?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
{
$ip=Unknown;
}
echo你的IP:.$ip;
?>





<?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;
?>