Laravel 8:未定义的偏移量错误消息

Question

我正在使用Laravel控制器：

class AdminController extends Controller
{
protected function uploadImages($file)
{
$year = Carbon::now()->year;
$imagePath = "/upload/images/{$year}/";
$filename = $file->getClientOriginalName();
$file = $file->move(public_path($imagePath), $filename);
$sizes = ["300","600","900"];
$url['images'] = $this->resize($file->getRealPath(), $sizes, $imagePath, $filename);
$url['thumb'] = $url['images'][$sizes[0]];
dd($url);
}
private function resize($path, $sizes, $imagePath, $filename)
{
$images['original'] = $imagePath . $filename;
foreach($sizes as $size)
{
$image[$size] = $imagePath . "{$size}" . $filename;
Image::make($path)->resize($size, null, function($constraint){
$constraint->aspectRatio();
})->save(public_path($image[$size]));
}
return $images;
}
}

当我填写此控制器附带的表格时，我会收到以下消息：

错误异常未定义的偏移量：300

从此行：

$url['thumb'] = $url['images'][$sizes[0]];

那么这里的问题是什么呢？

Answer 1

问题可能是这一行：

$image[$size] = $imagePath . "{$size}" . $filename;

应该是：

$images[$size] = $imagePath . "{$size}" . $filename;