(PHP 5 < 5.3.0, PECL ming SVN)
SWFDisplayItem::setDepth — Sets z-order
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swfdisplayitem::setdepth() sets the object's
z-order to depth. Depth defaults to the
order in which instances are created (by adding a shape/text to
a movie)- newer ones are on top of older ones. If two objects are
given the same depth, only the later-defined one can be moved.
The object may be a swfshape(), a swfbutton(), a swftext() or a swfsprite() object. It must have been added using the swfmovie::add().
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