A function to set CSS classes to an html element such as "first", "last", "odd", "even" and "active"

setCSSClasses

<?php

/* Sets classes such as "first", "last", "odd", "even" and "active"
 * @param $articles An array of articles to count
 * @param $index The index to watch for
 * @param $currentArticle The index of the current article
 * @return string
**/

function setCSSClasses($index = null, $articles = null, $currentArticle = null) {
  return ((is_int($index) && ($index == 1)) ? " first" : "").(((is_int(count($articles))) && ($index == count($articles))) ? " last" : "").((is_int($index) && ($index % 2 == 0)) ? " even" : " odd").(($index == $currentArticle)) ? " active" : "");
}

?>