How to return false?

[kilinanatoly]

I am from Russia and I write through an interpreter.
I need to return false under certain conditions and output an error for the user. how to do it? I try this way:
Return Json :: encode (['files' => [], 'error' => 'The file exceeds the permissible size in XXX MB']);

But still in the console I see that the 'fileuploaddone' method works. Go out mistake.Empty file upload result. Please help me!

[tonydspaniard]

Return false? Or return error? You need to add a rule to your Model and then validate: https://github.com/2amigos/yii2-file-upload-widget/blob/master/src/actions/FileUploadAction.php#L114

That will fire an error, and the plugin will display the error.