zend安装成功后 试用phpinfo查看，检测到：This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
没有zend Optimizer信息
解决方法：
1.在装ZendOptimizer之前将selinux关掉。方法是编辑/etc/selinux/config文件中的SELINUX="" 为 disabled ，然后重启。
2.不关闭selinux安装完ZendOptimizer以后进入/usr/local/Zend/lib（具体安装路径）执行命令：
chcon ZendExtensionManager.so -t shlib_t
然后在进入/usr/local/Zend/lib/Optimizer-3.3.0/php-x.x.x目录，执行命令：
chcon ZendOptimizer.so -t shlib_t
然后重启apache服务，正常的话以上问题应该解决。
再使用phpinfo查看：
This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
with Zend Optimizer v3.3.0, Copyright (c) 1998-2007, by Zend Technologies
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