使用PHP curl将URL作为文件上传

Question

I have images that are hosted on a CDN, and I want to upload that image to some other system via their API. Normally I would just use curl and put an @ character in front of the file to upload. Since this is a URL, that won't work since it expects the file to be local. I don't want to copy it local first since the files could be videos and that could be time consuming.

It seems there should be a way to do this with PHP curl. I'm open to using sockets instead, but I'm not sure how to simulate how curl does the submission.

Answer 1

<?php

$save_file_url =  file_get_contents($your_files_CDN_file_URL);

$fp = fopen('test','w');
fwrite($fp,$save_file_url);
$save_file = realpath('test') ;

$url = "http://URL_TO_SEND_FILE/get_file.php";
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible;)");
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
$post = array(
    "file_is_this"=> "@".$save_file,
    "app"=>'test'
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
$response = curl_exec($ch);

?>

And you will recieve file at get_file.php.