$image_old = imagecreatefrompng($ImageName);
}
$image_jpg = imagecreatetruecolor($width, $height);
imagecopyresampled($image_jpg, $image_old, 0, 0, 0, 0, $width, $height, $width, $height);
imagejpeg($image_jpg, $newfilename);
imagedestroy($image_old);
imagedestroy($image_jpg);