Qu'est-ce que post_class ()
/* we see in php code */
<div id="post-<?php the_ID(); ?>" <?php post_class( 'class-name' ); ?>>
/* we see in html code like this */
<div id="post-4564" class="class-name post-4564 post type-post status-publish format-standard hentry category-news">
Avenger