public function index() {
$ip = $this->input->ip_address();
if(!in_array($ip, $this->allowed_ips)){
$res = ‘access denied‘;
echo ($ip);
echo ($res);
die();
}
$data[‘htmlData‘] = ‘‘;
$data[‘title‘] = ‘‘;
$data[‘description‘] = ‘‘;
$this->load->view(‘welcome_message‘,$data);
}

application/config/config

$config[‘allowed_ips‘]  = array(‘127.0.0.1‘, ‘192.168.113.2‘,‘112.64.175.190‘,‘103.242.170.38‘,‘101.68.66.2‘,‘203.94.14.53‘,‘123.30.238.14‘,‘119.81.21.170‘,‘192.168.23.1‘,‘180.173.80.209‘,‘180.173.84.111‘,‘203.74.199.3‘, ‘192.168.0.144‘);

php CI ip限制