Laravel Bulk Insert

I am trying to find solution to below use case, using Laravel I am inserting bulk products with respective quantity and description. For example product1 with id:pro_1 with its quantity and description, same with other products. If I submit the form how I know for which product the quantity and description is.

    @foreach(get_products_by_parent_name("Content") as $product_id => $product_name)
                     <div class="col-md-4">
                        <div class="form-group">
                              <h4><label class="p_name"><input type="checkbox" value="">  </label></h4>
                              <label>Quantity</label>
                              <input type="number" min="1" class="form-control" 
                              name="qn_">
                              <label>Description</label>
                              <textarea class="form-control" name="desp_" style="resize: none;"></textarea>
                        </div>
                      </div>
@endforeach

via Zack