function genCode($length = 10) {


    $characters = 'abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPRSTUVWXYZ';


    $charactersLength = strlen($characters);


    $randomString = '';


    for ($i = 0; $i < $length; $i++) {


        $randomString .= $characters[rand(0, $charactersLength - 1)];


    }


    return $randomString;


}