Laravel uploading multiple files in different fields in database

I was trying three images in three different fields in database..for that I was following method in controller.But the problem I'm facing is though i have three input fields it stored only two images with same name in the public folder and in database it stored value like 1 (for product_image), 4 ( for feature_image), 9 (for slurp_image). How do i properly stored the images in public folder as well as database..thanks in advance .

Here is the controller:

public function store(Request $request)
    {
        $product = new Product();
    $files= [];

    if($request->file('product_image'))   $files[] = $request->file('product_image');
    if($request->file('feature_image'))   $files[] = $request->file('feature_image');
    if($request->file('slurp_image'))     $files[] = $request->file('slurp_image');


      foreach($files as $file)
      {

        if(!empty($file))
        {
    $filename = time().'.'.$file->getClientOriginalExtension();
     $file->move('images/',$filename);
      }
     }
        $product->product_image = $filename[0];

        $product->feature_image = $filename[1];

        $product->slurp_image = $filename[2];
     $product->save();
    }

here is the View part :

<div class="form-group">
     <label>Product Image</label>
     <input type="file" name="product_image"  id="product_image" width="200px">

</div>
<div class="form-group">
     <label>Feature Image</label>
     <input type="file" name="feature_image"  id="feature_image" width="200px">

</div>
<div class="form-group">
     <label>Slurp Image</label>
     <input type="file" name="slurp_image"  id="slurp_image" width="200px">

</div>

via User57