PHP - Upload image from external server

Question

I'm trying to post a photo to Facebook and it works as long as the image is in the same folder as the PHP script:

  $file= "myimage.png";
    $args = array(
        'message' => 'Photo from application',
        );
      $args[basename($file)] = '@' . realpath($file);
    $ch = curl_init();

What do I need to change to make it work for external images, e.g.:

$file= "http://www.example.com/myimage.png";

There I found two answers for you with a single well thought Google search. — transilvlad
– transilvlad, Commented Jun 11, 2013 at 20:29

user142162 · Accepted Answer · 2013-06-11 20:28:43Z

3

You must first download the image to your server then use that path. Here's an example of downloading the image to a temporary file:

$temp_name = tempnam(sys_get_temp_dir(), "external");
copy($file, $temp_name);
// ...
$args[basename($file)] = '@' . realpath($temp_name);

answered Jun 11, 2013 at 20:28

user142162

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Comments

transilvlad · Accepted Answer · 2013-06-11 20:36:58Z

1

To be sure file is downloaded without damage I prefer this way.

$path = '/where/to/save/file';
$url = 'http://path.to/file';

$remote = fopen($url, "rb");
if($remote) {
    $local = fopen($path, "wb");
    if($local) {
        while(!feof($remote)) {
            fwrite($local, fread($remote, 1024 * 8 ), 1024 * 8);
        }
    }
}
if ($remote) fclose($remote);
if ($local)  fclose($local);

I recommend using uniqid() to generate the path.

Then pass the path to your code.

Since the file will now be local it should upload just fine.

answered Jun 11, 2013 at 20:36

transilvlad

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2 Comments

Bynd Over a year ago

Hi can you please explain more I'm trying to upload image using your code but I didn't succeed. Thank you

transilvlad Over a year ago

The code downloads it does not upload. The ticket title is confusing. Uploading files is more complicated since you probably also need to authenticate.

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