I have store the image file in admin through post method but when trying to put the same code for pdf/word its not working

I want to upload pdf file on page but its not working as done with image and its working

I have made a column filepath for pdf/word then code in postcontroller but not working

public function store(Request $request) {

    $this->validate($request, [


       'title' =>'required',
        'featured'=>'required|image',
        'content'=>'required',
        'category_id'=>'required'

    ]);

    $featured= $request->featured;
    $featured_new_name=time().$featured->getClientOriginalName();
    $featured->move('uploads/posts', $featured_new_name);

    $post = Post::create([

        'title'=>$request->title,
        'content'=>$request->content,
        'featured'=>'uploads/posts/'. $featured_new_name,
        'category_id'=>$request->category_id,
        'slug'=>str_slug($request->title)

and when I trying to add "filepath column name in data base" for pdf/ word then using in public function store(Request $request) {

    $this->validate($request, [


       'title' =>'required',
        'featured'=>'required|image',
        'content'=>'required',
        'category_id'=>'required',

        'file' => 'required',

    ]);

    $featured= $request->featured;
    $featured_new_name=time().$featured->getClientOriginalName();
    $featured->move('uploads/posts', $featured_new_name);

    $file=$request->file;
    $file=time().$file->getClientOriginalName();
    $extension = Input::file('file')->getClientOriginalExtension();

    $filename = rand(11111111, 99999999). '.' . $extension;
    $fullPath = $filename;
    $request->file('file')->move(base_path() . '/uploads/pdf/', $filename);



    $post = Post::create([

        'title'=>$request->title,
        'content'=>$request->content,
        'featured'=>'uploads/posts/'. $featured_new_name,
        'file'=>'uploads/pdf' .$filename,

        'category_id'=>$request->category_id,
        'slug'=>str_slug($request->title)


    ]);


  Session::flash('success', 'New Blog has been Published on Website for Particular Menu');

  return redirect()->back();

}

via Chebli Mohamed