View difference between Paste ID: DZDDeX9f and 3nKeL0rW

 <?php
 
 /*****************************************************************
 *
 *
 * a hierarchical list of all posts by nested categories, post title and authors
 * © Fabio Marzocca - 2015-2022
 *
 * Frontend
 ******************************************************************/
 
 
 
 function ACT_hierarchy_indexes($atts)
 {
 
     if (!isset($_POST['order'])) {
         $_POST['order']="category";
     }
 
     if ($atts['singleuser']) {
         $atts['admin'] = "1";
     }
     ob_start();
 
     echo '<div class="ACT-wrapper">';
     if (count(explode(",", $atts['show'])) > 1) :
 ?>
 
 <form name="form1" method="post" >
         <div align="center" class="styled-select"><?php _e("Group by:", 'list-all-posts-by-authors-nested-categories-and-titles') ?>
           <select name="order"  id="order"  onChange=" ;this.form.submit();">
             <?php if (!($atts['singleuser']) and strpos($atts['show'], "Author") !== false) : ?>
             <option value="author" <?php if ($_POST['order']  == "author") {
                 echo "selected";
                                    } ?>><?php _e("Author", 'list-all-posts-by-authors-nested-categories-and-titles'); ?> </option>
             <?php endif; ?>
             <?php if (strpos($atts['show'], "Title") !== false) : ?>
             <option value="title" <?php if ($_POST['order']  == "title") {
                 echo "selected";
                                   } ?>><?php _e("Title", 'list-all-posts-by-authors-nested-categories-and-titles'); ?> </option>
             <?php endif; ?>
                 <?php if (strpos($atts['show'], "Category") !== false) : ?>
             <option value="category" <?php if ($_POST['order']  == "category") {
                 echo "selected";
                                      } ?>><?php _e("Category", 'list-all-posts-by-authors-nested-categories-and-titles'); ?> </option>
                 <?php endif; ?>
           </select>
         </div>
     </form>
 <?php
     endif;
 
     if (count(explode(",", $atts['show'])) == 1) :
         $_POST['order'] = strtolower($atts['show']);
     endif;
 
     if (count(explode(",", $atts['show'])) == 2 and strpos($atts['show'], "Category") === false) :
         $_POST['order'] = "author";
     endif;
 
     if ($_POST['order']  == "author") {
         ACT_byauthor($atts);
     } elseif ($_POST['order']  == "title") {
         ACT_bytitle($atts);
     } else {
         ACT_bycategory($atts);
     }
     echo "</div> <!-- ACT-wrapper -->";
     $output_string=ob_get_contents();
     ob_end_clean();
     return $output_string;
 }
 
 function ACT_bycategory($atts)
 {
     /* Start browsing categories*/
     foreach (get_categories('hide_empty=0') as $cat) :
         if (strpos($atts['exclude'], $cat->slug)!== false) :
             continue;
         endif;
 
   /* multiple changes  */
         if (!$cat->parent) {
              echo "<h2 id='".$cat->name."'><a href='".get_category_link($cat)."'>".wptexturize($cat->name)."</a></h2><ol>";
             ACT_traverse_cat_tree( $cat->term_id, $atts);
         }
     endforeach;
 }
 
 
 function ACT_traverse_cat_tree($cat, $atts)
 {
     $postargs = array(
         'public'   => true,
         '_builtin' => false
     );
     $post_types = get_post_types( $postargs);
 
     array_push($post_types, 'post');
     $ordering = 'DESC';
     if ($atts['reverse-date']) {
         $ordering = 'ASC';
     }
     $args = array('category__in' => array( $cat ), 'numberposts' => -1, 'order' => $ordering, 'post_type' => $post_types);
 
     $cat_posts = get_posts( $args );
 
     if ($cat_posts) :
         $i = 0;
         foreach ($cat_posts as $post) :
             /* exclude admin?  */
             if (!$atts['admin']) {
                 if (is_super_admin($post->post_author)) :
                     continue;
                 endif;
             }
 
             echo '<li class="subpost">';
            $postdate = date_i18n( get_option( 'date_format' ), strtotime($post->post_date)).' - ';
     echo ($atts['postdate'] ? $postdate : ''). '<a href="' . get_permalink( $post->ID ) . '">' . wptexturize($post->post_title) . '</a>';
             if (!($atts['singleuser'])) :
                 echo "<span class='righttext'>[".get_the_author_meta( 'first_name', $post->post_author )." ".get_the_author_meta( 'last_name', $post->post_author )."]</span>";
             endif;
 
             echo '</li>';
             $i++;
             if ($atts['postspercategory'] > -1) :
                 if ($i >= $atts['postspercategory']) :
                     break;
                 endif;
             endif;
         endforeach;
     endif;
     $next = get_categories('hide_empty=0&parent=' . $cat);
 
     if ($next) :
         foreach ($next as $cat) :
             if (strpos($atts['exclude'], $cat->slug)!== false) :
                 continue;
             endif;
 
 /* changes 1 n 5  */
                echo "<ol><li class='subcat'><a href='".get_category_link($cat)."'>".wptexturize($cat->name)."</a></li>";
               ACT_traverse_cat_tree( $cat->term_id, $atts);
         endforeach;
     endif;
     echo '</ol>';
 }
 /* list ol closer  */
 
 function ACT_bytitle($atts)
 {
     $postargs = array(
         'public'   => true,
         '_builtin' => false
     );
     $post_types = get_post_types( $postargs);
 
     array_push($post_types, 'post');
 
     if ($atts['totalpoststitle'] > -1) {
         $args = array(  'posts_per_page' => -1, 'post_type' => $post_types);
     } else {
         $args = array(  'posts_per_page' => -1,
                     'orderby' => 'title' ,
                     'post_type' => $post_types,
                     'order' => 'ASC');
     }
     $articles = get_posts($args);
     echo "<h4></h4>";
     if ($articles) :
 
 /* changes 1 line */
         echo "<ol>";
         $i = 0;
         foreach ($articles as $article) :
         /* excluded categories  */
             if (has_category(explode(',', $atts['exclude']), $article->ID)) :
                 continue;
             endif;
 
         /* include admin? */
             if (!$atts['admin']) {
                 if (is_super_admin($article->post_author)) :
                     continue;
                 endif;
             }
             echo '<li>';
             $postdate = date_i18n( get_option( 'date_format' ), strtotime($article->post_date)).' - ';
             echo ($atts['postdate'] ? $postdate : '').'<a href="' . get_permalink( $article->ID ) . '">' . wptexturize($article->post_title) . '</a>';
             if (!($atts['singleuser'])) :
                 echo "<span class='righttext'>[".get_the_author_meta( 'first_name', $article->post_author )." ".get_the_author_meta( 'last_name', $article->post_author )."]</span>";
             else :
                 $categories = get_the_category( $article->ID );
                 $list_cats =null;
                 foreach ($categories as $cat) :
                     $list_cats .= wptexturize($cat->name).", ";
                 endforeach;
                 $list_cats = substr($list_cats, 0, -2);
                 echo "<span class='righttext'>[".$list_cats."]</span>";
             endif;
             echo '</li>';
             $i++;
             if ($atts['totalpoststitle'] > -1) :
                 if ($i >= $atts['totalpoststitle']) :
                     break;
                 endif;
             endif;
         endforeach;
         echo "</ol>";
     endif;
 }
     /* changes uper 3rd line */
 
 function ACT_byauthor($atts)
 {
     $param = 'blog_id=1&orderby=nicename';
     $autori= get_users( $param );
 
     foreach ($autori as $user) :
         /*check if excluded admin */
         if (!$atts['admin']) {
             if (is_super_admin($user->ID)) :
                 continue;
             endif;
         }
         /* Array of WP_User objects */
         $postargs = array(
         'public'   => true,
         '_builtin' => false
             );
             $post_types = get_post_types( $postargs);
 
             array_push($post_types, 'post');
 
             $ordering = 'DESC';
         if ($atts['reverse-date']) {
             $ordering = 'ASC';
         }
 
         $args= array(
             'author'        =>  $user->ID,
             'post_type'   => $post_types,
             'posts_per_page' =>  -1,
             'category__not_in' => get_cats_by_slug(explode(',', $atts['exclude']))
                 );
         if ($atts['postsperauthor'] == -1) {
             array_push($args,'order',$ordering );
         }
             $author_posts=  get_posts( $args );
         if (!$author_posts) :
             continue;
         endif;
             echo '<h4><a href="'.get_author_posts_url($user->ID).'">'.$user->display_name.'</a></h4>';
 
    /* changes 2nd line */
         if ($author_posts) {
             echo '<ol>';
             $i = 0;
             foreach ($author_posts as $author_post) {
                 $postdate = date_i18n( get_option( 'date_format' ), strtotime($author_post->post_date)).' - ';
                 echo '<li>';
                 echo ($atts['postdate'] ? $postdate : ''). '<a href="' . get_permalink( $author_post->ID ) . '">'.$author_post->post_title.'</a>';
                 $categories = get_the_category( $author_post->ID );
                 $list_cats =null;
                 foreach ($categories as $cat) :
                     $list_cats .= wptexturize($cat->name).", ";
                 endforeach;
                 $list_cats = substr($list_cats, 0, -2);
                 echo "<span class='righttext'>[".$list_cats."]</span>";
                 echo '</li>';
                 $i++;
                 if ($atts['postsperauthor'] > -1) :
                     if ($i >= $atts['postsperauthor']) :
                         break;
                     endif;
                 endif;
             }
         }
             echo '</ol>';
     endforeach;
 }
     /* changes uper 3rd line */
 
 function get_cats_by_slug($catslugs) {
     $catids = array();
     foreach($catslugs as $slug) {
         if (!get_category_by_slug($slug) ) break;
         $catids[] = get_category_by_slug($slug)->term_id;
     }
     return $catids;
 }
 
 ?>