(PECL imagick 2.0.0)
Imagick::setImageOrientation — Sets the image orientation
$orientation
   )Sets the image orientation.
   Returns TRUE on success.
  
Example #1 Imagick::setImageOrientation()
<?php
//Doesn't appear to do anything
function setImageOrientation($imagePath, $orientationType) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->setImageOrientation($orientationType);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>