I have my website hosted at a shared server. The maximum upload limit is 5MB. I do not have the ability to change the PHP ini settings, which is fine.
In Laravel, all the validations and file uploading works fine if the uploaded file is under 5MB. However, when a file greater than 5MB is uploaded, I get the following exception instead of a validation error:
如何验证或强制文件处于服务器的上载限制之下？
您似乎对更改PHP限制以允许更大的文件不感兴趣.在我看来，你希望你的最大上传量为5MB，如果超过这个上限，你会返回一个正确的回复.
You can handle the FileException exception inside your exception handler at app/Exceptions/Handler.php. Update the render method to add in the code you need. For example, if you'd like to return a validation exception, you will need to handle the validation inside the exception handler for the FileException exception.
public function render($request, Exception $exception)
{
if ($exception instanceof \Symfony\Component\HttpFoundation\File\Exception\FileException) {
// create a validator and validate to throw a new ValidationException
return Validator::make($request->all(), [
'your_file_input' => 'required|file|size:5000',
])->validate();
}
return parent::render($request, $exception);
}
This is untested, but should give you the general idea.
您还可以通过javascript进行客户端验证，这样过大的文件实际上永远不会发送到服务器，但是客户端可以禁用或删除javascript，所以最好设置好服务器端处理.
对于客户端验证，如果将事件处理程序附加到文件输入的"Change"事件，则可以使用this.files[0].size判断文件大小，然后执行任何其他操作(禁用表单、删除上传的文件等).