SWFText->setHeight seems to take a pixel value, not a twips value (20 twips per pixel)
(PHP 5 <= 5.3.0, PECL ming SVN)
SWFText::setHeight — Sets the current font height
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.
swftext::setheight() sets the current font height to
height. Default is 240.
No value is returned.