php7怎么安装zend guard ？？

用的ddiscuz  3.4，必须用php7，怎么老是出现这个提示？


Zend Guard Run-time support missing!

One more more files on this web site were encoded by ZendGuard and the required run-time support is not installed orproperly configured.

For the Web site user

This means that this Web server is not configured correctly to runthe files that it contains. Please contact the Web site'sadministrator/webmaster and inform them of this problem and give themthe URL you are trying to display to help them in diagnosing theproblem.

For The Site Administrator/Web Master

One or more files on your site were encoded with Zend Guard. Thismay be third party libraries that were provided to you by an ISV. Toallow these files to properly run you need to download and installone of the Zend guard run-time libraries. This is either ZendOptimizer or Zend Loader. The proper files can be downloaded fromhttp://www.zend.com/guard/downloads.This software is provided free of charge.

General Disclaimer: Zend Technologies is not responsible tothe configuration and setup of web sites using Zend Guard technology.Please contact your software vendor if these components were providedby an ISV or consult your Zend Guard Users Guide if these files wereencoded by your organization.

我也想问这个问题。php扩展里没看到这个