Quick site banner

site-banner.php

<?php
/*
 * Plugin Name: Site Banner
 * Version: 1.0
 * Description:  Adds a quick announcement banner to the top of your website.
*/


// Exit if accessed directly
if ( !defined('ABSPATH')) exit;


add_action( 'wp_footer', function() {
	?>
	<style>
		.site-banner {
			position: absolute;
			top: 0;
			left: 0;
			right: 0;
			margin: 0;
			width: 100%;
			font-size: 1em;
			padding: 1em 0;
			text-align: center;
			background-color: #0099ff;
			color: #fff;
			z-index: 99998;
			box-shadow: 0 1px 1em rgba(0,0,0,.2);
		}
		.admin-bar .site-banner {
			top: 32px;
		}
		#wrapper {
			top: 60px;
		}
	</style>
	<div class="site-banner">
		My text goes here.
	</div>
	<?php
});