PHP function class to save remote images to local_PHP tutorial

//
// Function: Get the remote image and save it locally
//
//
// Make sure you have written the file to the local server Permissions
//
//
// Variable description:
// $url is the complete URL address of the remote image and cannot be empty.
// $filename is an optional variable: if empty, the local filename will be automatically generated based on time and date
//.
function GrabImage($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;
}
$img=GrabImage("/upload/20081208002838680 .jpg","");
if($img):echo '

<img src="'.$img.'">

';else:echo "false ";endif;

?> in dedecms: if(!empty($saveremoteimg))
{
$body = stripslashes($body);
$img_array = array( );
preg_match_all("/(src|SRC)=["|'| ]{0,}(http://(.*).(gif|jpg|jpeg|bmp|png))/isU" ,$body,$img_array);
$img_array = array_unique($img_array[2]);
set_time_limit(0);
$imgUrl = $img_dir."/".strftime("%Y% m%d",time());
$imgPath = $base_dir.$imgUrl;
$milliSecond = strftime("%H%M%S",time());
if(! is_dir($imgPath)) @mkdir($imgPath,0777);
foreach($img_array as $key =>$value)
{
$value = trim($value);
$get_file = @file_get_contents($value);
$rndFileName = $imgPath."/".$milliSecond.$key.".".substr($value,-3,3);
$fileurl = $imgUrl."/".$milliSecond.$key.".".substr($value,-3,3);
if($get_file)
{
$fp = @fopen($ rndFileName,"w");
@fwrite($fp,$get_file);
@fclose($fp);
}
$body = ereg_replace($value,$fileurl,$body );
}
$body = addslashes($body);
}