How to enable Zend Optimizer/Ioncube for my web hosting account?

This instruction applies only for Standard, Power and Power Plus hosting accounts and requires to EDIT the php.ini file. Inside your web hosting account, PHP Settings menu add the following line at the end of the file:

# For Ioncube and php5:
zend_extension = /usr/local/ioncube/ioncube_loader_lin_5.2.so

# For Zend Optimizer and php5
[Zend]
zend_extension_manager.optimizer=/usr/local/Zend_php5/lib/Optimizer-3.3.3
zend_optimizer.version=3.3.3
zend_extension=/usr/local/Zend_php5/lib/ZendExtensionManager.so
zend_optimizer.optimization_level=15