$ a =新PharData（$ tar_achive）; cakephp3

I get following error when loading builtin PharData PHP class in Cakephp3 Controller

Error: Class 'App\Controller\PharData' not found

I call PharData like this :

$a = new PharData($tar_achive);

(PharData class works when using it outside of Cakephp3 with simple php script)

How I can tell cakephp3 to use builtin PHP Class ?

Try to use class with slash which will inform that it is built in PHP class

$a = new \PharData($tar_achive);