How to perform a file upload via CURL and PHP - php

Question

I have been creating a script to insert data from a JSON file to a POST request.
While it does what it needs to download the image in the URL supplied than it needs to download it and perform a post request on my route.
I have been struggling for the past few hours to get it working but no success.
I have used realpath and CurlFile but it didn't make it work.
Here is the request:
<?php
$image = $this->makeCurlFile(realpath("scorpion_stretch-59788999e4432d80.jpg"));
$body = ["name" => "uploaded_file", "filename" => $image->name];
echo print_r($body);
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://resources.diamondappgroup.com/upload.php",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => $body,
CURLOPT_HTTPHEADER => array(
"Accept: */*",
"Cache-Control: no-cache",
"Connection: keep-alive",
"Content-Type: application/x-www-form-urlencoded",
"Host: resources.diamondappgroup.com",
"Postman-Token: 45ebd192-9621-482c-8735-2061bc31c6fa,6a7a959f-372d-4afb-9efa-6b4da47ea1b0",
"User-Agent: PostmanRuntime/7.11.0",
"accept-encoding: gzip, deflate",
"cache-control: no-cache",
"content-length: 312659",
"content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW"
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}