在 Laravel 5.4 中获取上传失败的文件的文件名

如何获取上传失败的文件的文件名并将其传递给验证错误消息？例如：“file.0必须是 1024 KB。” 就像“失败文件样本.jpg必须是 1024 KB。”

下面是示例代码安排：

$messages = [
    'mimes' => 'File(s) must be of type: :values.',
    'size'   => 'The ' .  $request->file('file_field')->getClientOriginalName() . ' must be :size kilobytes.'
];

$this->validate(
    request(), 
    ['file_field' => 'bail|required|mimes:gif,jpg,jpeg,png|size:1024'], 
    $messages
);

Use:

$validationArray = [];
foreach ($request->file('file_field') as $key => $file) {
    $validationArray['file_field.'.$key.'.size'] => 'The ' .  $file->getClientOriginalName() . ' must be 1024 kilobytes.'; 
}
$messages = [
    'file_field.*.mimes' => 'File(s) must be of type: :values.',
     $validationArray
];
$this->validate(
    $request, 
    [
        'file_field' => 'bail|required|array',
         'file_field.*' => 'mimes:gif,jpg,jpeg,png|size:1024'
    ], 
$messages);