Uploading images vk api, how to upload without saving to the server?

Question

PHP

Hello.
If you send a picture from the server via curl_file, everything is OK,
if you get the picture into a variable and send it, we get an error, apparently curl is looking for a file but it is not there.

$img_real_path = file_get_contents($url_image);
$curl_file = curl_file_create($img_real_path,'image/jpg','test_name.jpg');