<?php
// $image = file_get_contents('http://www.url.com/image.jpg');
// file_put_contents('/images/image.jpg', $image); //Where to save the image on your server
$image = file_get_contents("http://www.catswhocode.com/blog/wp-content/themes/cat-stellation/images/rss.png");
file_put_contents('downloaded/rss.png', $image);
?>

download folder