condition use in eloquent laravel code example

Example 1: laravel where condition with if

$query = DB::table('user_ads')
            ->join('ads', 'users_ads.ad_id', '=', 'ads.id')
            ->orderBy($column, $method);

if ($input['search']) {
    $query->where('short_description', $input['search']);
}

if ($input['category']) {
    $query->where('category', $input['category']);
}

$query->join('users', 'users_ads.user_id', '=', 'users.id')
    ->select('ads.id', 'ads.img1', 'ads.short_description', 'ads.category', 'ads.product', 'ads.price', 'users.city')

$result= $query->get();

return $result;

Example 2: condition for both of one should be true laravel eloquent

WHERE age < 6 OR (age > 8 AND name IN ('Jane', 'Jerry'))
  
return \App\Dogs::select('name', 'age')
    ->where('age','<', 6)
    ->orWhere(function($q){
        $q->where('age','>', 8);
        $q->whereIn('name', ['Jane', 'Jerry']);
    })
    ->get();