Multidimensional Array does not work

Hi,
I have installed this plugin but when i am trying to print Multidimensional Array then it is not working, here is the code that doesn’t print anything.

[insert_php]
$args = array(
'fruits' => array('apple'=>'Apple','banana'=>'Banana','mango'=>'Mango'),
'vegitables' => array('pumpkin'=>'Pumpkin','beetroot'=>'Beetroot','carrot'=>'Carrot')
);
print_r($args);
[/insert_php]