How to append an HTML string, from template_process_page() to $page_bottom region in Drupal 7?

I'm new to Drupal 7.

I'm trying to append an HTML strin开发者_JS百科g, from inside the template_process_page() function in my module.

Is there any tricky way to do this?

Thanks.

In short, add it to the $variables array inside your preprocess function, such template_preprocess_page. See the handbook page on Setting up variables for use in a template, for more information.