{
        return $this->name;
    }
    public function age()
    {
        return $this->age;
    }
}
class UserCollection
{
    protected $users;
    public function __construct(array $users)
    {
        $this->users = $users;
    }
    public function users()
    {
        return $this->users;
    }
    public function sortBy($method)
    {
        usort($this->users, function ($userOne, $userTwo) use($method) {
            return $userOne->{$method}() <=> $userTwo->{$method}();
        });
    }
}
$collection = new UserCollection([new User('jabed', 126), new User('bangali', 36), new User('hasan', 46), new User('babu', 56), new User('md', 66)]);
//$collection->sortBy('age');
$collection->sortBy('name');
var_dump($collection->users());