Can I use "." in my array key?

In my current project, I found some data array keys have dot character. Like :

PHP :

$data['page.title'] = 'YYY';
$data['page.body'] = 'XXXXXXXX';

$clsTBS->MergeFields('data', $data);


Of course, if I use "." in HTML side, it doesn't work. like :

<div>[data.page.title]</div>


So, did anyone know how to merge?

Try