Send byte data in the request - php

Question

Hi I am having trouble sending only byte data in a request
I only want to sent the [bytes from data stream] but am struglling in stripping this from my curl request.
Can anybody help me stripping this of via curl please.
-----------------------------7dc1f42e3005a8
Content-Disposition: form-data; name="upload"; filename="file.mp3"
Content-Type: audio/mpeg
**[bytes from data stream]**
-----------------------------7dc1f42e3005a8--
The curl that I am using below, I am wondering if there is a quick way in curl to send only a specific part of load in this case only the byte data.
$fp = fopen($localfile['tmp_name'], 'r');
$ch = curl_init();
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); // --data-binary
curl_setopt($ch, CURLOPT_URL, 'http://api.com/api/v4/track/upload?api_key=xxx&filetype=mp3');
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/octet-stream'));
$response = curl_exec($ch);

Answer 1

you can use below solution
//your url
$url = 'http://localhost/test/test.php';
$file = realpath('php1.php');
// build multipart
//set appropriate content type in headers
$params = "--ABC1234\r\n"
. "Content-Type: application/x-www-form-urlencoded\r\n"
. "--ABC1234\r\n"
. "Content-Type: text/php\r\n"
. "Content-Disposition: attachment; filename=\"php1.php\"\r\n"
. "\r\n"
. file_get_contents($file) . "\r\n"
. "--ABC1234--";
$first_newline = strpos($params, "\r\n");
$multipart_boundary = substr($params, 2, $first_newline - 2);
$request_headers = array();
$request_headers[] = 'Content-Length: ' . strlen($params);
$request_headers[] = 'Content-Type: multipart/form-data; boundary=' . $multipart_boundary;
// send the request now
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
$reply = curl_exec($ch);
curl_close ($ch);
on other end you will be able to get uploaded file in $_FILES variable.
Tested at local server.
Hope this will help you.