rotate_image_by_original_orientation.php

//read EXIF header from uploaded file
$exif = exif_read_data($_FILES['ImageFile']['tmp_name']);

//fix the Orientation if EXIF data exist
if(!empty($exif['Orientation'])) {
    switch($exif['Orientation']) {
        case 8:
            $createdImage = imagerotate($image,90,0);
            break;
        case 3:
            $createdImage = imagerotate($image,180,0);
            break;
        case 6:
            $createdImage = imagerotate($image,-90,0);
            break;
    }
}