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//获取真实的ip
function getIP()
{
$ip='';
if (getenv("HTTP_CLIENT_IP"))
$ip = getenv("HTTP_CLIENT_IP");
else if(getenv("HTTP_X_FORWARDED_FOR"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if(getenv("REMOTE_ADDR"))
$ip = getenv("REMOTE_ADDR");
else $ip = "Unknow";
if($ip != "Unknow"){ //去除其他ip信息只保留用户ip
$ip_a = strtr($ip, array(' '=>''));
$ip_b = explode(',',$ip_a);
$ip = $ip_b[0];
}
return $ip;
}