A barebone plugin that allows you to add custom code snippets to your WordPress website

my-snippets.php

<?php

/*
* Plugin Name:       My custom code snippets
* Plugin URI:        https://permalinkmanager.pro/
* Description:       A barebone plugin that allows you to add custom code snippets to your WordPress website
* Version:           1.0.0
* Author:            Maciej Bis
* Author URI:        http://maciejbis.net/
* License:           GPL-2.0+
* License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
* Domain Path:       /languages
*/

/**
 * [Add Google Analytics Tracking]
 * This is only an example snippet, you are free to remove the below function.
 */
function bis_add_google_analytics_code() {
	?>
	<!-- Google Analytics -->
	<script>
	(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
	(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
	m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
	})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

	ga('create', 'UA-XXXXX-Y', 'auto');
	ga('send', 'pageview');
	</script>
	<!-- End Google Analytics -->
	<?php
}
add_action( 'wp_footer', 'bis_add_google_analytics_code' );