Every second post different class in blog view

Question

To assign different classes to every 2nd post in blog view in WordPress adding this code into function.php was suggested as solution. Most people claim it is helpful, but to me it just adds odd at the end of the post class. There is no even class anywhere.

function alternating_post_class($classes) {
    global $wp_query;
    $classes[] = ( $wp_query->current_post%2 === 0 ? 'odd' : 'even' );
    return $classes;
}
add_filter('post_class', 'alternating_post_class');

What have I done wrong? It is suposed to add odd class to my first blog post, then even class for my second post in the blog view, but the result is as I said always the same: odd.

Answer 1

Give this a try?

function oddeven_post_class ( $classes ) {
   global $current_class;
   $classes[] = $current_class;
   $current_class = ($current_class == 'odd') ? 'even' : 'odd';
   return $classes;
}
add_filter ( 'post_class' , 'oddeven_post_class' );
global $current_class;
$current_class = 'odd';

and be sure you're using <?php post_class(); ?>