(PECL ps >= 1.1.0)
ps_end_page — End a page
$psdoc
) : boolEnds a page which was started with ps_begin_page(). Ending a page will leave the current drawing context, which e.g. requires to reload fonts if they were loading within the page, and to set many other drawing parameters like the line width, or color.
成功时返回 true， 或者在失败时返回 false。