Uploading multi images in Laravel 5.8 - laravel

Question

I am a beginner in laravel. I'm trying to submit a post with the option to upload multiple files if the user wants. I keep getting the error "Undefined variable: data." Where did I go wrong?
public function store(Request $request)
{
//validate
$this->validate($request, [
'title' => 'required|min:10',
'body' => 'required|min:20',
'filename' => 'nullable|max:2480',
'filename.*' => 'mimes:jpeg,jpg,png'
]);
//store Image
if($request->file('filename'))
{
foreach($request->file('filename') as $image)
{
$name=time().$image->getClientOriginalName();;
$image->move(public_path().'/images/', $name);
$data[] = $name;
}
}
$post= new Post();
$post->user_id = auth()->user()->id;
$post->title = $request->input('title');
$post->body = $request->input('body');
$post->filename=json_encode($data);
$post->save();
return back()->withMessage('Post created successfully.');
}

Answer 1

I think that it will be better to declare your array outside the foreach loop.
You can try something like this:
Outside your foreach loop.
$data = array();
Inside your foreach loop, try to populate the array like this:
array_push($data, $name);
public function store(Request $request)
{
//validate
$this->validate($request, [
'title' => 'required|min:10',
'body' => 'required|min:20',
'filename' => 'nullable|max:2480',
'filename.*' => 'mimes:jpeg,jpg,png'
]);
//Initialize an empty array
$data = array();
//store Image
if($request->file('filename'))
{
foreach($request->file('filename') as $image)
{
$name=time().$image->getClientOriginalName();;
$image->move(public_path().'/images/', $name);
//populate array here
array_push($data, $name);
}
}
$post= new Post();
$post->user_id = auth()->user()->id;
$post->title = $request->input('title');
$post->body = $request->input('body');
$post->filename=json_encode($data);
$post->save();
return back()->withMessage('Post created successfully.');
}