functions.php

<?php

add_action('wp_head', 'webworks_facebook_analytics');

function webworks_facebook_analytics() {
	if(current_user_can('manage_options')) {
	   return;
	}

	?>
	<script>
	  window.fbAsyncInit = function() {
		FB.init({
		  appId      : '228785407629856',
		  xfbml      : true,
		  version    : 'v2.8'
		});
		FB.AppEvents.logPageView();
	  };

	  (function(d, s, id){
		 var js, fjs = d.getElementsByTagName(s)[0];
		 if (d.getElementById(id)) {return;}
		 js = d.createElement(s); js.id = id;
		 js.src = "//connect.facebook.net/en_US/sdk.js";
		 fjs.parentNode.insertBefore(js, fjs);
	   }(document, 'script', 'facebook-jssdk'));
	</script>
	<?php
}