phpはローカルの実際のIPを取得します

function real_ip()
{
static $realip = NULL;

if ($realip !== NULL)
{
return $realip;
}

if (isset($_SERVER))
{
if (isset ($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$arr =explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);

foreach ($arr AS $ip)
{
$ip = トリム($ ip);

if ($ip != 'unknown')
{
$realip;

ブレーク;
}
}
}
elseif (isset($_SERVER['HTTP_CLIENT_IP']))
{
$realip = $_SERVER['HTTP_CLIENT_IP'];
}
else
{
if (isset($_SERVER['REMOTE_ADDR']))
{
$realip = $_SERVER['REMOTE_ADDR'];
}
else
{
$realip = '0.0.0.0';
}
}
}
else
{
if ( 'HTTP_X_FORWARDED_FOR'))
{
$realip = getenv('HTTP_X_FORWARDED_FOR');
}
elseif ( getenv('HTTP_CLIENT_IP'))
{
$realip = getenv('HTTP_CLIENT_IP');
}
else
{
$realip = MOTE_ADDR');
}
}

preg_match("/[d. ]{7,15}/", $realip, $onlineip);
$realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';

$realip を返します;
}