if somehow you encounter this kind of error(mostly this will be encounter by first timers using ZendFramework)

Warning: require_once(Zend/Application.php) [function.require-once]: failed to open stream: No such file or directory...
Fatal error: require_once() [function.require]: Failed opening required 'Zend/Application.php'....

you can either include the path library(where you installed Zend Framework your client path) in your php.ini, or manually copy the zend library under your application library folder.

for php.ini settings

where /usr/local/ZendFrameworkCli is the path I installed my ZendFramework .../library is where the zend libraries are located.