Laravel Http Client cannot attach files contents required - laravel

Question

I have been looking for the answer but failed to do so.
The problem is simple, I am trying to make an HTTP request using Illuminate\Support\Facades\Http class as documented here https://laravel.com/docs/8.x/http-client#multi-part-requests.
My code:-
$picture = fopen(public_path('/temp_pass/image.jpeg'),'r');
$response = Http::attach('attachment', $picture)
->withHeaders(['Accept'=>'application/json'])
->post('mydomain.com/item/store',['item_id' => 'my_item_id']);
The picture URL is ok. The domain to send to also ok. Unfortunately, I got this error
A 'contents' key is required
I hope great developers here can help me solve this.

Answer 1

The line Http::attach('attachment', $picture) refers to the following file and method.
Illuminate\Http\Client\PendingRequest.php
public function attach($name, $contents = '', $filename = null, array $headers = [])
A 'contents' key is required occurs when $contents is falsy (empty, null, false, 0, etc.) based on my testing.
In your case, this refers to $picture. You should check that $picture actually contains a file stream as expected. Dump it before the HTTP request to test.
dd($picture);
// stream resource #7 ▼
// timed_out: false
// blocked: true
// eof: false
// wrapper_type: "plainfile"
// stream_type: "STDIO"
// mode: "r"
// unread_bytes: 0
// seekable: true
// uri: "/.../image.jpeg"
// options: []
// }