<?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; 
}