How to use third party library

You do it like this: https://codeigniter.com/user_guide/conce...l#classmap

PHP Code:

$classmap = [
    'MobileDetect' => APPPATH .'third_party/Mobile_Detect.php'
];

// Controller
new \MobileDetect; 


Depending on your needs, we kinda have it already built in:
https://codeigniter.com/user_guide/libra...l#isMobile