The cpdf_restore() function restores the environment saved with cpdf_save(). It works like the postscript command grestore. Very useful if you want to translate or rotate an object without effecting other objects. 如果成功则返回 TRUE，失败则返回 FALSE。
例子 1. Save/Restore
<?php
cpdf_save($pdf);
// do all kinds of rotations, transformations, ...
cpdf_restore($pdf)
?>
