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Font Awesome in den Footer

function drweb_add_fontawesome_footer() {
?>
<link rel="stylesheet" href="https://opensource.keycdn.com/fontawesome/4.6.3/font-awesome.min.css" type='text/css' media='all' property='stylesheet' />    
<?php }
add_action( 'wp_footer', 'drweb_add_fontawesome_footer' );