WordPress Including external css file


Example

In this example we want to include font awesome icon font

function themeSlug_enqueue_scripts() {
    wp_enqueue_style( 'font-awesome', '//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.css');
}
add_action('wp_enqueue_scripts', 'themeSlug_enqueue_scripts');