(PECL gmagick >= Unknown)
Gmagick::haspreviousimage — Checks if the object has a previous image
Returns true
if the object has more images when traversing the list in the reverse direction.
Questa funzione non contiene parametri.
Returns true
if the object has more images when traversing the list in the reverse direction, returns false
if there are none.
Throws an GmagickException on error.