Ограничение доступа к форуму

X-Forwarded-For

X-Real-IP

$_SERVER['X-Real-IP]

$_SERVER['X-Forwarded-For']

$_SERVER['REMOTE_ADDR']

function _tst_ip($env) {
if (($ip = getenv($env)) === false) return false;
$i = ip2long($ip);
if ($i === false || $i == -1 || $i == 0) return false;
// RFC 1819
// Class A: 10.0.0.0 - 10.255.255.255
// Class B: 172.16.0.0 - 172.31.255.255
// Class C: 192.168.0.0 - 192.168.255.255
$a = ($i >> 24) & 0xFF;
$b = ($i >> 16) & 0xFFFF;
if (($a == 0x0A) || ($b == 0xC0A8) || ($b >= 0xAC10 && $b <= 0xAC1F)) return false;
return $ip;
}

function Return_IP() {
if (($ip = $this->_tst_ip('HTTP_CLIENT_IP')) !== false) return $ip;
if (($ip = $this->_tst_ip('HTTP_X_FORWARDED_FOR')) !== false) return $ip;
if (($ip = $this->_tst_ip('HTTP_X_FORWARDED')) !== false) return $ip;
if (($ip = $this->_tst_ip('HTTP_FORWARDED_FOR')) !== false) return $ip;
if (($ip = $this->_tst_ip('HTTP_FORWARDED')) !== false) return $ip;
return $_SERVER['REMOTE_ADDR'];
}

function Return_IP() {
return $_SERVER['HTTP_X_REAL_IP'];
}

function Return_IP() {
return $_SERVER['REMOTE_ADDR'];
}