(PHP 5 <= 5.3.0, PECL ming SVN)
SWFDisplayItem::skewYTo — Sets the Y-skew
$degrees
   )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.
   swfdisplayitem::skewyto() sets the
   y-skew to degrees. For degrees
   is 1.0, it means a 45-degree forward slant. More is more upward, 
   less is more downward.
  
The object may be a swfshape(), a swfbutton(), a swftext() or a swfsprite() object. It must have been added using the swfmovie::add().
No value is returned.