WP custom excerpt lenght for global use

wordpress-excerpt-lenght.php

<?php
/**
 * @author @david 
 * Wordpress excerpt lenght for global use, with automatic "read more"
 * 
 */
function et_excerpt_length($length) {
	return 120;
}
add_filter('excerpt_length', 'et_excerpt_length');
/* Add a link  to the end of our excerpt contained in a div for styling purposes and to break to a new line on the page.*/
function et_excerpt_more($more) {
	global $post;
	return '<div class="text-right"><a href="'. get_permalink($post->ID) . '" class="button small">Lees verder</a></div>';
}
add_filter('excerpt_more', 'et_excerpt_more');
?>