PHP 5.3.X 开始 Zend Optimizer 正式被 Zend Guard Loader 取代了.
Zend Guard Loader (Runtime for PHP 5.3) 5.5.0
http://www.zend.com/en/products/guard/downloads mkdir -p /usr/local/zend
mv ZendGuardLoader.so /usr/local/zend/
vi /usr/local/lsws/lsphp5/lib/php.ini
zend_extension=/usr/local/zend/ZendGuardLoader.so
重启apache 或者php-fpm 就好了