(PECL imagick 2.0.0)
Imagick::combineImages — Combines one or more images into a single image
本函数还未编写文档，仅有参数列表。
Combines one or more images into a single image. The grayscale value of the pixels of each image in the sequence is assigned in order to the specified channels of the combined image. The typical ordering would be image 1 => Red, 2 => Green, 3 => Blue, etc.
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Returns TRUE on success.
Throws ImagickException on error.