img.php
<?php
$url = $_GET["url"];
$file = urldecode($url);
$file = str_replace(" ","%20",$file);
$what = getimagesize($file);
switch(strtolower($what['mime'])) {
case 'image/png':
$img = imagecreatefrompng($file);
break;
case 'image/jpeg':
$img = imagecreatefromjpeg($file);
break;
case 'image/gif':
$img = imagecreatefromgif($file);
break;
default: die();
}
$new = imagecreatetruecolor($what[0],$what[1]);
imagecopy($new,$img,0,0,0,0,$what[0],$what[1]);
header('Content-Type: image/jpeg');
imagejpeg($new);
imagedestroy($new);