Setting Up Zend Framework on CentOS - Unsure where to place Zend folder

Question

I have a CentOS server and am attempting to setup Zend Framework on it. The command which php outputs

/usr/bin/php

and php -i | grep include_path outputs

include_path => .:/usr/share/pear:/usr/share/php=> .:/usr/share/pear:/usr/share/php

So, I copied the Zend folder from the Framework donwload to both /usr/share/pear and /usr/share/php and also copied zf.sh and zf.php to /usr/bin/php.

When I execute zf show version, I receive

bash: zf: command not found

Can anyone suggest further steps to take to ensure installation of ZF?

Thanks!