References like in CI4

application/controllers/components/stv/Config.php

@@ -28,7 +28,9 @@ class Config extends FHC_Controller
 			'component' => './Stv/Studentenverwaltung/Details/Notizen.js'
 		];
 
-		Events::trigger('stv_conf_student', $result);
+		Events::trigger('stv_conf_student', function & () use (&$result) {
+			return $result;
+		});
 
 		$this->outputJsonSuccess($result);
 	}

application/core/CI3_Events.php

@@ -24,7 +24,7 @@ class CI3_Events
 			self::$eventsSorted[$event] = false;
 	}
 
-	public static function trigger($event, &...$args)
+	public static function trigger($event, ...$args)
 	{
 		if (!isset(self::$events[$event]))
 			return;
@@ -37,7 +37,7 @@ class CI3_Events
 		}
 		
 		foreach (self::$events[$event] as $conf) {
-			call_user_func_array($conf[1], $args);
+			$conf[1](...$args);
 		}
 	}
 }