Gmagick::haspreviousimage

(PECL gmagick >= Unknown)

Gmagick::haspreviousimage — Checks if the object has a previous image

public mixed Gmagick::haspreviousimage ( void )

Returns TRUE if the object has more images when traversing the list in the reverse direction

此函数没有参数。

Returns TRUE if the object has more images when traversing the list in the reverse direction, returns FALSE if there are none.

错误时抛出 GmagickException。