Warning: This function is
currently not documented; only the argument list is
available.
Warning: This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
Rotates an image the specified number of degrees. Empty
triangles left over from rotating the image are filled
with the background color.
Return Values
Returns TRUE
on success.