使用curl将url文件上传到远程服务器

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.

1. First download that file from url provided by user.
2. Upload that image on http://1234.4321.67.11/upload.php
3. 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;