Cannot use object of type Illuminate\Http\UploadedFile as array
Stefan Bogdanescu
Founder & Senior Architect · 2026-06-29
# Fixing the Attachment Headache: Why You Canât Use `UploadedFile` as an Array in Laravel Mail
Dealing with file uploads and email attachments is a common hurdle when working with Laravel. As a developer, you expect the framework to handle the complexities of file streams seamlessly. However, sometimes, the interaction between the HTTP request objects and our custom data structures can lead to confusing errors.
You are encountering the error: `Cannot use object of type Illuminate\Http\UploadedFile as array`. This message is telling you precisely that somewhere in your code, a variable that you are trying to treat as a simple list (an array) is actually holding an instance of the `Illuminate\Http\UploadedFile` class, which is an object, not an array.
This issue often arises when iterating over file inputs and attempting to structure them for a mailer, especially when dealing with multiple files uploaded simultaneously or when misunderstanding how Laravel collects file data from the request.
Let's dive deep into why this happens in your specific context (Laravel 5.4) and how to refactor your code to achieve successful email attachments.
---
## The Root Cause: Objects vs. Arrays in File Handling
When you use `$request->file('uploads')`, Laravel returns a collection or an instance of `Illuminate\Http\UploadedFile` objects, depending on the input type. When you iterate over this result, you are iterating over these file *objects*.
In your controller code:
```php
$files = $request->file('uploads'); // This is likely an object/collection of UploadedFile objects.
```
When you loop through it and try to assign the results into a new array structure:
```php
foreach($files as $file) {
$files[] = [ /* ... data ... */ ]; // You are trying to append an array into an already object-based context, causing confusion.
}
```
The core problem is that you are trying to mix the file objects themselves with your custom array structure in a way that breaks PHP's type expectations for array manipulation. The solution is to extract the necessary data (paths and metadata) from the `UploadedFile` object *before* structuring it for the mailer.
## The Solution: Extracting Data Correctly
Instead of relying on the complex iteration of the raw file objects, you should use the methods provided by the `UploadedFile` class to get the necessary information needed for attachmentâspecifically, the temporary path or stream.
Since you are building a custom structure for your mailer, focus on extracting the actual file path (`getRealPath()`) and metadata directly within the loop.
Here is a revised approach focusing on clarity and correctness:
### Refactored Controller Logic
We will restructure the logic to ensure we are collecting clean data points for the mail builder, rather than trying to modify the original `$files` collection in a confusing way.
```php
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Mail;
// Assuming Structure is your Eloquent model or class
public function postSendMassive(Request $request)
{
// Retrieve all uploaded files from the 'uploads' disk/input
$uploadedFiles = $request->file('uploads');
$emails = Structure::where('type_structure_id', 4)->pluck('adresse_email_structure');
$subject = $request->subject;
$bodyMessage = $request->texte;
$mailAttachmentsData = [];
// Iterate over the file objects and prepare data for attachment
foreach ($uploadedFiles as $file) {
$mailAttachmentsData[] = [
'file' => $file->getRealPath(), // Get the actual path
'options' => [
'mime' => $file->getClientMimeType(),
'as' => $file->getClientOriginalName()
],
];
}
// Pass the correctly structured array to the mailer
Mail::to('test@gmaIL.com')->send(new MassiveEmail($subject, $bodyMessage, $mailAttachmentsData));
return back()->with('status', "Email envoyé");
}
```
### Refactored Mail Builder Logic
The mail builder now receives a clean array of attachment data, making the process straightforward and error-free:
```php
public function build()
{
$subject = $this->subject;
$bodyMessage = $this->bodyMessage;
$filesData = $this->files; // This is now the clean array we prepared
$email = $this->markdown('email.MassiveMail', compact('bodyMessage'))
->subject($subject . '-FFRXIII Licences & Compétitions');
foreach ($filesData as $fileAttachment) {
// Safely use the extracted path and options
$email->attach($fileAttachment['file'], $fileAttachment['options']);
}
return $email;
}
```
## Conclusion: Embracing Laravel's Abstraction
The error you faced is a classic example of fighting against how an object-oriented framework like Laravel structures its request data. Instead of trying to force the `UploadedFile` object into an array structure manually, we should leverage the methods on that object (`getRealPath()`, `getClientOriginalName()`) to extract the raw data needed for our specific task (email attachment).
By refactoring your code to explicitly collect the required paths and metadata into a dedicated array *before* passing it to the mailer, you ensure type safety and eliminate runtime errors. Remember, when building complex applications with Laravel, always look for ways to use Eloquent relationships and service classes effectively; this principle applies equally to handling file operations as demonstrated in resources like [laravelcompany.com](https://laravelcompany.com). Clean data flow leads to robust code.