Uploading url file to remote server using curl - php

Question

I've been on this for 3 days now but I can't seem to resolve it, the user will input the url and the system will upload it on remote server.. this is what I've done so far
$POST_DATA = array(
'file' => '#'. 'http://images.visitcanberra.com.au/images/canberra_hero_image.jpg',
'extension' => 'txt',
'filename' => 'test',
'directory' => 'uploads/'
);
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, 'http://1234.4321.67.11/upload.php');
curl_setopt($curl, CURLOPT_TIMEOUT, 30);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $POST_DATA);
$response = curl_exec($curl);
curl_close ($curl);

Answer 1

Well do it in this way.
First download that file from url provided by user.
Upload that image on http://1234.4321.67.11/upload.php
And delete that file after successfully uploaded on server.
This might help you for uploading image on server using cURL : https://stackoverflow.com/a/15177543/1817160
And this might help you in understanding how to download image from url :
Copy Image from Remote Server Over HTTP

Answer 2

Use the following function to upload the remote image using curl. Call this by passing image url and path to folder to save the image.
function grab_image($url,$saveto){
$ch = curl_init ($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
$raw=curl_exec($ch);
curl_close ($ch);
if(file_exists($saveto)){
unlink($saveto);
}
$fp = fopen($saveto,'x');
fwrite($fp, $raw);
fclose($fp);
}
and ensure that in php.ini allow_url_fopen is enable

Answer 3

$file_name_with_full_path = realpath('./upload/example.png');
$curl_handle = curl_init("https://example.com");
curl_setopt($curl_handle, CURLOPT_POST, 1);
$args['file'] = new CurlFile($file_name_with_full_path, 'image/png');
curl_setopt($curl_handle, CURLOPT_POSTFIELDS, $args);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, true);
$returned_data = curl_exec($curl_handle);
curl_close ($curl_handle);
echo $returned_data;