// Include the other controller in this controller
use AppHttpControllersTasksController;
// Instantiate other controller class in this controller's method
$tasks_controller = new TasksController;
// Use other controller's method in this controller's method
$tasks_controller->postNotification($comment_content, $author);
app('AppHttpControllersPrintReportController')->getPrintReport();
return App::call('blalaControllerName@functionName');