Prints Post Format icon using Font Awesome in WordPress

WP Post Format icon with Font Awesome

if ( ! function_exists( 'prefix_post_format_icon' ) ) :
/**
* Prints HTML with meta information for the current post format using Font Awesome.
*/
function prefix_post_format_icon(){
	$icon_string = '<span class="format-icon"><i class="fa %1$s"></i></span>';
	if(is_sticky()){
		$format_icon_class = 'fa-thumb-tack';
	}else{
		switch (get_post_format()) {
			case "aside":
				$format_icon_class = 'fa-quote-plus';
				break;
			case "image":
				$format_icon_class = 'fa-image';
				break;
			case "video":
				$format_icon_class = 'fa-video-camera';
				break;
			case "quote":
				$format_icon_class = 'fa-quote-left';
				break;
			case "link":
				$format_icon_class = 'fa-link';
				break;
			default:
				$format_icon_class = 'fa-file-text-o';
		}
	}
	$icon_string = sprintf($icon_string, $format_icon_class );
	echo $icon_string;
}
endif;