'external'));
}
?>
source : http://www.gaslampmedia.com/blog/adding-external-style-sheets-your-drup…Sometimes it's best to add external CSS files through Drupal's drupal_add_css() function. A very practical example is where we add a Google web font to a subtheme. If you're customizing a subtheme of a complex theme like Omega and don't want to have to create a new page.tpl.php file just to add a custom style sheet, or the additional overhead of a custom module, this is a great solution.
Here's a handy little snippet to add an external style sheet to your Drupal 7 theme. Simply add this to your theme's template.php file
google web fonts