A snippet to demonstrate how to push a file upload form submission across a curl session

push-multipart.php

<?php

$data = array(
    'title' => 'My Form',
    'action' => 'new',
    'file' => '@/path/to/file.pdf',
);

$ch = curl_init();

    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_VERBOSE, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible;)");
    curl_setopt($ch, CURLOPT_URL, $API_URL);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

$response = curl_exec($ch);