Input type “file” returns EMPTY in Laravel php

Suppose
We have some photos that need to be updated
The user wants to delete one of the files while editing,
How do you know user has sent a NULL input file or not changes?
becuse Input type “file” returns EMPTY ,
So we have two similar state,
for example:
if($request->hasFile('filename')) {
//here is!!! ok you update the file
}else{
//but here not ok,
if you check input exist ,it does not solve the problem
}

how you handle this!

Comments

[Lito]

Create a checkbox input to mark photo to de deleted:

<input type="checkbox" name="delete" value="1" />

And in the backend service:

if ($request->hasFile('filename')) {
    $this->update()
} elseif ($request->input('delete')) {
    $this->delete();
}

[Abolhasan Momeni]

good idea,thank's