if(isset($_SERVER)){if(isset($_SERVER["HTTP_X_FORWARDED_FOR"])){$realip = $_SERVER["HTTP_X_FORWARDED_FOR"];}elseif(isset($_SERVER["HTTP_CLIENT_IP"])) {$realip = $_SERVER["HTTP_CLIENT_IP"];}else{$realip = $_SERVER["REMOTE_ADDR"];}}else{//不允许就使用getenv获取if(getenv("HTTP_X_FORWARDED_FOR")){$realip = getenv( "HTTP_X_FORWARDED_FOR");}elseif(getenv("HTTP_CLIENT_IP")) {$realip = getenv("HTTP_CLIENT_IP");}else{$realip = getenv("REMOTE_ADDR");}}return $realip;