How to Group Articles or Posts by Author

Grouping articles in specific criteria, like category, date or alphabet, could always help visitors to quickly find one or two posts. In my previous tutorial, I’ve shared a code snippet to group posts aphabetically. This time, I’ll share the code to group posts by their author. Read More: http://www.dynamicwp.net/articles-and-tutorials/how-to-group-articles-or-posts-by-author/

PHP

<?php
$blogusers = $wpdb->get_results( "SELECT ID, user_nicename from $wpdb->users WHERE 1=1 ORDER BY display_name" );
if ($blogusers) {
  foreach ($blogusers as $bloguser) {
    $user = get_userdata($bloguser->ID);
    $args=array(
      'author' => $user->ID,
      'post_type' => 'post',
      'post_status' => 'publish',
      'posts_per_page' => -1,
      'caller_get_posts'=> 1
    );
    $my_query = null;
    $my_query = new WP_Query($args);
    if( $my_query->have_posts() ) {
      echo '<p>User ID ' . $user->ID . ' ' . $user->user_firstname . ' ' . $user->user_lastname . '</p>';
      echo get_avatar( $user->ID, 46 );
      while ($my_query->have_posts()) : $my_query->the_post(); ?>
        <p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></p>
        <?php
      endwhile;
    }
  wp_reset_query();
  }
}
?>