pimcore-workflow-events.php

\Pimcore::getEventManager()->attach("object.preUpdate", function (\Zend_EventManager_Event $e) {
    $object = $e->getTarget();
    
	$status = $object->getProperty("workflowStatus"); 
	
	if($status == "step1") {
		// send mail to ...
		
		// set new status
		$object->setProperty("workflowStatus", "text", "step2"); 
	}
	else if($status == "step5") {
		
		$object->setPublished(true); 
		
		// done
		$object->setProperty("workflowStatus", "text", "finished");
	}
});