Sending a chunked file with curl and receiving - php

Question

I have created two file php. The first one for send a file through curl utilizing the chunking method. And a second one for receiving the file.
What I need is to send a chunked file with curl and receive it. However, I am not really sure that the code in this two pages does what I need.
This is the code in the first page (send.php).
<?php
function curlPutThrottle($ch, $fh, $length = false)
{
if (!$length)
{
$length = 4096;
}
return fread($fh, $length);
}
$target_url = "http://localhost/save.php?filename=test2.zip";
$cFile = fopen ('./test.zip', "r");
$size = filesize('./test.zip');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_PUT, true);
// Let curl know that we are sending an entity body
curl_setopt($ch, CURLOPT_UPLOAD, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
// Let curl know that we are using a chunked transfer encoding
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Transfer-Encoding: chunked'));
curl_setopt($ch, CURLOPT_READFUNCTION, 'curlPutThrottle');
curl_setopt($ch, CURLOPT_INFILE, $cFile);
curl_setopt($ch, CURLOPT_INFILESIZE, $size);
$result=curl_exec ($ch);
curl_close ($ch);
echo $result;
?>
And this is the code in save.php.
<?php
function file_get_contents_chunked($filename, $chunk_size, $callback) {
$handle = fopen($filename, 'r');
if (feof($handle)) {
return 0;
} else {
while (!feof($handle)) {
call_user_func_array($callback, array(fread($handle, $chunk_size)));
}
fclose($handle);
return 1;
}
}
if ($_SERVER['REQUEST_METHOD'] == 'PUT') {
$count = 0;
$file = fopen('./'.$_GET['filename'], 'wb+');
$res = file_get_contents_chunked('php://input', 8192, function ($chunk) use (&$file) {
global $count;
fwrite($file, $chunk);
$count++;
});
if (!$res)
echo "file not received";
else
echo "file received ".$count;
} else {
echo 'Not a PUT request!!!';
}
?>
Is this code in these two pages correct for sending a chunked file through curl? Or is it incomplete in some way?
And, if is it incomplete what I need to send a chunked file correctly using curl?
Thanks at all for your help in this.