[WordPress] Mini plugin, adds favicons, touch icons and tiles for desktop browsers, iOS, Android and Windows. Generated HTML output via http://realfavicongenerator.net/. Requires a sub-directory /img to store all images in. HEADS UP: This is no longer needed as of WordPress 4.3!

real-favicons.php

<?php
/**
 * Plugin Name: Real Favicons
 * Description: Adds favicons, touch icons and tiles for desktop browsers, iOS, Android and Windows. Generate HTML output via <a href="http://realfavicongenerator.net/">realfavicongenerator.net</a>. Store all generated images in sub-directory /img.
 * Version: 2014.01
 * Author: Caspar Hübinger
 * Author URI: http://glueckpress.com/
 * License: GNU General Public License v2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 */

if ( ! defined( 'ABSPATH' ) )
	exit;

/**
 * Load plugin.
 */
function real_favicons() {

	add_action( 'wp_head', 'real_favicons_add_favicons' );
}
add_action( 'plugins_loaded', 'real_favicons' );


/**
 * Add the favicon.
 *
 * @return string
 */
function real_favicons_add_favicons() {

	$img_url = plugin_dir_url( __FILE__ ) . "img";
?>
	<link rel="apple-touch-icon" sizes="57x57"   href="<?php echo $img_url; ?>/apple-touch-icon-57x57.png">
	<link rel="apple-touch-icon" sizes="114x114" href="<?php echo $img_url; ?>/apple-touch-icon-114x114.png">
	<link rel="apple-touch-icon" sizes="72x72"   href="<?php echo $img_url; ?>/apple-touch-icon-72x72.png">
	<link rel="apple-touch-icon" sizes="144x144" href="<?php echo $img_url; ?>/apple-touch-icon-144x144.png">
	<link rel="apple-touch-icon" sizes="60x60"   href="<?php echo $img_url; ?>/apple-touch-icon-60x60.png">
	<link rel="apple-touch-icon" sizes="120x120" href="<?php echo $img_url; ?>/apple-touch-icon-120x120.png">
	<link rel="apple-touch-icon" sizes="76x76"   href="<?php echo $img_url; ?>/apple-touch-icon-76x76.png">
	<link rel="apple-touch-icon" sizes="152x152" href="<?php echo $img_url; ?>/apple-touch-icon-152x152.png">
	<link rel="icon" type="image/png" href="<?php echo $img_url; ?>/favicon-196x196.png" sizes="196x196">
	<link rel="icon" type="image/png" href="<?php echo $img_url; ?>/favicon-160x160.png" sizes="160x160">
	<link rel="icon" type="image/png" href="<?php echo $img_url; ?>/favicon-96x96.png" sizes="96x96">
	<link rel="icon" type="image/png" href="<?php echo $img_url; ?>/favicon-16x16.png" sizes="16x16">
	<link rel="icon" type="image/png" href="<?php echo $img_url; ?>/favicon-32x32.png" sizes="32x32">
	<meta name="msapplication-TileColor" content="#0095bc">
	<meta name="msapplication-TileImage" content="<?php echo $img_url; ?>/mstile-144x144.png">
<?php
}