(PECL gmagick >= Unknown)
Gmagick::getimageindex — Gets the index of the current active image
Returns the index of the current active image within the Gmagick object.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
Index of current active image
锟斤拷锟斤拷时锟阶筹拷 GmagickException锟斤拷