Uncaught TypeError: is_uploaded_file() must be of type string

[danFWD]

When using a file input with the 'multiple' attribute, you must add a validation rule with the dot syntax e.g. photos.* or it throws an error if one or more files is attached:

Uncaught TypeError: is_uploaded_file(): Argument #1 ($filename) must be of type string, array given in .../somnambulist/validation/src/Rules/Behaviours/CanValidateFiles.php:11

I assume this is expected behavior, but the uncaught error should probably return an exception.

In addition, when requiring a file to be attached to a multiple-file input, it does not throw a validation error if no file is attached: <input type="file" name="photos" multiple accept=".jpg,.jpeg" />

// expected behavior is to throw validation error when no file is attached:
$validation = [
  'photos.*' => 'required|uploaded_file:0,1M,jpeg',
];

Am I interpreting or writing the rule wrong, or am I correct in that this is a bug?

[danFWD]

EDIT: Scratch the last part about the required rule not working. After review, it does actually work.

[dave-redfern]

@danFWD Thanks for reporting this issue.

The error you are seeing happens because the _FILES array is not being converted to a normalised array format. That only happens when dot notation is used. Examples for handling multiple file uploads is documented in the current readme, however: there is no explicit warning about requiring the use of dot notation on the attribute name.

I will update the docs accordingly and add an exception in the file validation trait to guard against this scenario.

[dave-redfern]

1.4.2 will now raise an exception if the file data appears as an array and the docs have been revised to make it clear that dot notation is needed.