How to add external style sheets to your Drupal theme

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
function yourtheme_preprocess_html(&$variables) {
'type' => 'external'));
source :
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