(PECL imagick 2.0.0)
Imagick::getImageIndex — Gets the index of the current active image
本函数暂无文档，仅有参数列表。
Returns the index of the current active image within the Imagick object. This method has been deprecated. See Imagick::getIteratorIndex
Returns an integer containing the index of the image in the stack, throwing ImagickException on error.