Remote grabbed images are blank

[Mag <genphp@xxxxxxxxx>]

Hi,
I got a pretty good code snippet from Zend to grap a
remote image and save it to disk, the problem is, when
it saves to my disk i am unable to open the
images...they are blank and the file matches the
remote images filesize...


Heres the code I got from Zend:
############ Start code ##############
<?php 

function GrabImage($url,$filename="") { 
  if($url==""):return false;endif; 

  if($filename=="") { 
    $ext=strrchr($url,"."); 
    if($ext!=".gif" && $ext!=".jpg"):return
false;endif; 
    $filename=date("dMYHis").$ext; 
  } 

  ob_start(); 
  readfile($url); 
  $img = ob_get_contents(); 
  ob_end_clean(); 
  $size = strlen($img); 

  $fp2=@fopen($filename, "a"); 
  fwrite($fp2,$img); 
  fclose($fp2); 

  return $filename; 
} 





$img=GrabImage("URL-TO-IMAGE-COMES-HERE",""); 
if($img):echo '<pre><img
src="'.$img.'"></pre>';else:echo "No image
there.";endif;   


?> 

############### End image code ###########

Any idea whats wrong?

Thanks,
Mag


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