nss-change-fa-icons.php

<?php
/*
 * Plugin Name: Naked Social Share Add-On
 * Plugin URI: https://www.nosegraze.com
 * Description: Demonstrates how to changes the Font Awesome icons used in Naked Social Share.
 * Version: 1.0
 * Author: Nose Graze
 * Author URI: https://www.nosegraze.com
 * License: GPL2
 * 
 * @package nss-addon
 * @copyright Copyright (c) 2016, Nose Graze Ltd.
 * @license GPL2+
*/

/**
 * Change Twitter Icon
 *
 * Changes the Twitter icon to be square. Include the full HTML markup
 * for Font Awesome.
 * 
 * Other filter names are:
 *
 *  + Twitter: naked_social_share_twitter_icon
 *  + Facebook: naked_social_share_facebook_icon
 *  + Pinterest: naked_social_share_pinterest_icon
 *  + StumbleUpon: naked_social_share_stumbleupon_icon
 *  + Google+: naked_social_share_google_icon
 *  + LinkedIn: naked_social_share_linkedin_icon
 *
 * @param string $icon_html
 *
 * @return string
 */
function nss_addon_twitter_icon( $icon_html ) {
	return '<i class="fa fa-twitter-square"></i>';
}

add_filter( 'naked_social_share_twitter_icon', 'nss_addon_twitter_icon' );