Php extensions means additional modules that we need to run/execute with an already installed PHP on server. No need to run easyapche to install/uninstall modules like zend optimizer,EAccelerator, IonCubeLoader, SourceGuardian, PHPSuHosin etc. You can use the command scripts/phpextensionmgr to do it.

List all installed modules:

/scripts/phpextensionmgr list

Install new module:

/scripts/phpextensionmgr install module_name

Uninstall a module:

/scripts/phpextensionmgr uninstall module_name

Thank you for your time.