Laravel - Multi fields search form

I'm builind a form with laravel to search users, this form has multiple fields like

1. Age (which is mandatory)


2. Hobbies (optional)


3. What the user likes (optional)


4. And some others to come

For the age, the user can select in the list (18+, 18-23,23-30, 30+ etc...) and my problem is that i would like to know how i can do to combine these fields into one single query that i return to the view.

For now, i have something like this :

        if(Input::get('like')){
        $users = User::where('gender', $user->interested_by)->has('interestedBy', Input::get('like'))->get();
        if(strlen(Input::get('age')) == 3){
            $input = substr(Input::get('age'),0, -1);
            if(Input::get('age') == '18+' || Input::get('age') == '30+' )
            {
                foreach ($users as $user)
                {
                    if($user->age($user->id) >= $input){
                        $result[] = $user;
                        // On enregistre les users étant supérieur au if plus haut
                    }
                    else
                        $result = [];
                }
                return view('search.result', ['users' => $result]);
            }
            elseif (strlen(Input::get('age')) == 5) {
            $min = substr(Input::get('age'), 0, -3);
            $max = substr(Input::get('age'), -2);
            $result = array();
            foreach($users as $user)
            {
                if($user->age($user->id) >= $min && $user->age($user->id) <= $max)
                    $result[] = $user;
            }
            return view('search.result', ['users' => $result]);
            }
    }
    else
        $users = User::all();

And so the problem is that there is gonna be 2 or 3 more optional fields coming and i would like to query for each input if empty but i don't know how to do it, i kept the age at the end because it's mandatory but i don't know if it's the good thing to do. Actually this code works for now, but if i had an other field i don't know how i can do to query for each input, i know that i have to remove the get in my where and do it at the end but i wanna add the get for the last query..