// 获得提交者的IP地址

//获得提交者的IP地址
function getIp() {
	$ip = ‘Unknown‘;
	if(isset($_SERVER[‘HTTP_X_FORWARDED_FOR‘]))
		$ip = $_SERVER [‘HTTP_X_FORWARDED_FOR‘];
	else if(getenv(‘HTTP_X_FORWARDED_FOR‘))
		$ip = getenv(‘HTTP_X_FORWARDED_FOR‘);

	if (isset($_SERVER[‘HTTP_CLIENT_IP‘]))
		$ip = $_SERVER[‘HTTP_CLIENT_IP‘];
	else if (getenv(‘HTTP_CLIENT_IP‘))
		$ip = getenv(‘HTTP_CLIENT_IP‘);

	if (isset ($_SERVER[‘REMOTE_ADDR‘]))
		$ip = $_SERVER[‘REMOTE_ADDR‘];
	else if (getenv(‘REMOTE_ADDR‘))
		$ip = getenv(‘REMOTE_ADDR‘);
	return addslashes($ip);
}