(PECL ps:1.1.0-1.3.5)
ps_restore — Restore previously save context
Restores a previously saved graphics context. Any call of ps_save() must be accompanied by a call to ps_restore(). All coordinate transformations, line style settings, color settings, etc. are being restored to the state before the call of ps_save().
如果成功则返回 TRUE,失败则返回 FALSE。