$width = imagesx($img);
$height = imagesy($img);
switch($rotation) {
case 90: $newimg= @imagecreatetruecolor($height , $width );break;
case 180: $newimg= @imagecreatetruecolor($width , $height );break;
case 270: $newimg= @imagecreatetruecolor($height , $width );break;
case 0: return $img;break;
case 360: return $img;break;
}
if($newimg) {
for($i = 0;$i < $width ; $i++) {
for($j = 0;$j < $height ; $j++) {
$reference = imagecolorat($img,$i,$j);
switch($rotation) {
case 90: if(!@imagesetpixel($newimg, ($height - 1) - $j, $i, $reference )){return false;}break;
}
}
} return $newimg;
}
return false;
}