save file from outside url

I am trying to save a dynamically generated image on an outside server to a local file on my server using the code below: $fc = fopen($image_filename, "wb"); $file = fopen ($image_url, "rb"); if (!$file) { echo "<p>Unable to open remote file.\n"; exit; }else{ while (!feof ($file)) { $line = fread ($file, 1028); fwrite($fc,$line); } } fclose($fc); fclose($file); $image_filename is a locally referred to file, such as "../images/file1.png" and $image_url is an absolute address, such as "http://www.whatever.com/imagecreate.php". Instead of saving when I run the script through a browser, the image displays within the browser, and the script creates a file containing only "427" on the server. Any ideas why or what I can do to correct this? Jeremiah