SimpleImage::auto_orient PHP Method

    function auto_orient()
    {
        switch ($this->original_info['exif']['Orientation']) {
            case 1:
                // Do nothing
                break;
            case 2:
                // Flip horizontal
                $this->flip('x');
                break;
            case 3:
                // Rotate 180 counterclockwise
                $this->rotate(-180);
                break;
            case 4:
                // vertical flip
                $this->flip('y');
                break;
            case 5:
                // Rotate 90 clockwise and flip vertically
                $this->flip('y');
                $this->rotate(90);
                break;
            case 6:
                // Rotate 90 clockwise
                $this->rotate(90);
                break;
            case 7:
                // Rotate 90 clockwise and flip horizontally
                $this->flip('x');
                $this->rotate(90);
                break;
            case 8:
                // Rotate 90 counterclockwise
                $this->rotate(-90);
                break;
        }
        return $this;
    }