(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
Cette fonction ne contient aucun paramètre.
Returns TRUE if the object has more images when traversing the list in the reverse direction, returns FALSE if there are none.
Émet une exception GmagickException en cas d'erreur.