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:
Install new module:
/scripts/phpextensionmgr install module_name
Uninstall a module:
/scripts/phpextensionmgr uninstall module_name
Thank you for your time.