在 DirectAdmin 中安装Zend Optimizer / Guard Loader 是非常容易的，只要几个指令，就可以完成,，系统会自行辨认PHP 的版本，而去決定安装Zend Optimizer 还是 Zend Guard Loader 的。
[root@3w ~]# cd /usr/local/directadmin/custombuild
[root@3w custombuild]# ./build set zend yes
Changed zend option from no to yes
[root@3w custombuild]# ./build zend
Downloading ZendGuardLoader-php-5.3-linux-glibc23-x86_64.tar.gz…
–2013-06-01 07:00:29– http://files2.directadmin.com/services/custombuild/Zend GuardLoader-php-5.3-linux-glibc23-x86_64.tar.gz
Resolving files2.directadmin.com… 69.30.193.202
Connecting to files2.directadmin.com|69.30.193.202|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 434691 (425K) [application/x-gzip]
Saving to: `/usr/local/directadmin/custombuild/ZendGuardLoader-php-5.3-linux-gli bc23-x86_64.tar.gz’
100%[======================================>] 434,691 1.10M/s in 0.4s
2013-06-01 07:00:30 (1.10 MB/s) – `/usr/local/directadmin/custombuild/ZendGuardL oader-php-5.3-linux-glibc23-x86_64.tar.gz’ saved [434691/434691]
Zend Guard Loader has been installed.
重启apache
service httpd restart
然后我们再来看看php -v ，已经安装好Zend Guard Loader.
[root@3w custombuild]
# php -v
PHP 5.3.25 (cli) (built: May 31 2013 20:07:33)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies