(PECL ps >= 1.1.0)
ps_close — Closes a PostScript document
Closes the PostScript document.
This function writes the trailer of the PostScript document. It also writes the bookmark tree. ps_close() does not free any resources, which is done by ps_delete().
This function is also called by ps_delete() if it has not been called before.
如果成功则返回 TRUE，失败则返回 FALSE。