Curl chunked uploads with PHP - php

Question

I have written a PHP script that is using CURL to transfer large files from one Windows server to another. Both are running IIS, which has a 2GB limit for file uploads. My process works great for files less than 2GB. However, it fails for files > 2GB.
I have heard that CURL may have the ability to send files in chunks, which may solve my problem. However, I can't find any good examples of how to do this. My current working code is posted below. Does anyone know how to modify it to send my files in chunks (i.e. 100MB chunks)?
$postVars = array("file1" => $fileContents1,
"file2" => $fileContents2,
"outputPath" => $outputPath);
// Initializing curl
$ch = curl_init();
// Configuring curl options
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_USERPWD, $username . ":" . $password);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_VERBOSE, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_FORBID_REUSE, true);
curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
curl_setopt($ch, CURLOPT_BUFFERSIZE, '64000');
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_SSLVERSION, '3');
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: multipart/form-data'));
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
curl_setopt($ch, CURLOPT_POSTFIELDS,$postVars);
echo "Sending files...\n";
curl_setopt($ch, CURLOPT_TIMEOUT, 9999);
if(curl_exec($ch) === false)
{
echo 'Curl error: ' . curl_error($ch);
}
else
{
echo 'Operation completed without any errors';
}
$info = curl_getinfo($ch);
print_r($info);
curl_close($ch);

Answer 1

plupload is a javascript/php library, and it's quite easy to use and allows chunking of your desired size.
It uses HTML5 though. I found only the way to uploading a large file is PlUpload Library and make the FileManager Application. Hope it will help you also.