(PHP 4 >= 4.3.3)
SWFMovie->setRate() — Sets the animation's frame rate
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。
Sets the frame rate to the specified rate .
Animation will slow down if the player can't render frames fast enough- unless there's a streaming sound, in which case display frames are sacrificed to keep sound from skipping.
The frame rate, in frame per seconds.
无返回值。