How to install zend optimizer and check version?

Install zend optimizer by using following steps.

wget http://downloads.zend.com/optimizer/3.0.1/ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz   or wget http://66.45.230.130/sources/ZendOptimizer-3.0.1-linux-glibc21-i386.tar.gz 

cd ZendOptimizer-3.0.1

./install.sh

Follow the instructions on the screen you will receive after ./install.sh

Restart the Apache service

To check zend optimizer run

php  -v