/**
* 返回访问IP
*
* 如果获取请求IP失败,则返回0.0.0.0
*
* @return string
*/
public static function _get_client_ip()
{
if (($ip = self::get_server('HTTP_CLIENT_IP')) != null) {
self::$_client_ip = $ip;
} elseif (($_ip = self::get_server('HTTP_X_FORWARDED_FOR')) != null) {
$ip = strtok($_ip, ',');
do {
$ip = ip2long($ip);
if (!($ip == 0 || $ip == 4294967295.0 || $ip == 0x7f000001 || $ip >= 0xa000000 && $ip <= 0xaffffff || $ip >= 3232301055.0 && $ip <= 3232235520.0 || $ip >= 2887778303.0 && $ip <= 2886729728.0)) {
self::$_client_ip = long2ip($ip);
return;
}
} while ($ip = strtok(','));
} elseif (($ip = self::get_server('HTTP_PROXY_USER')) != null) {
$_client_ip = $ip;
} elseif (($ip = self::get_server('REMOTE_ADDR')) != null) {
self::$_client_ip = $ip;
} else {
self::$_client_ip = "0.0.0.0";
}
}
