laravel 多圖上傳

1.上傳表單
  <form action="api/fb" method="post" enctype="multipart/form-data">
  <input type="file" name="picture[]" >
  <input type="file" name="picture[]" >
  <input type="file" name="picture[]" >
 <button >"提交</button>
 </form>

2.圖片處理
if($res->hasFile('picture')){
   $i = 0;
  foreach($res->file('picture') as $file) {
      $file->move(base_path().'/public/uploads/', $file->getClientOriginalName());
       $i++;//記錄上傳張數
    }
    echo $i;die; 
    }