Ticket #45089: 45089.2.diff

wp-admin/includes/class-wp-list-table.php

@@ -838 +838 @@
         }
 
         /**
-         * Get a list of sortable columns. The format is:
-         * 'internal-name' => 'orderby'
-         * or
-         * 'internal-name' => array( 'orderby', true )
+         * Get a list of sortable columns.
          *
-         * The second format will make the initial sorting order be descending
+         * The format is:
+         * - `'internal-name' => 'orderby'`
+         * - `'internal-name' => array( 'orderby', 'asc' )` - The second element set the initial sorting order.
+         * - `'internal-name' => array( 'orderby', true )` - The second element will make the initial sorting order be descending.
          *
          * @since 3.1.0
          *
@@ -1052 +1052 @@
                                         $class[] = 'sorted';
                                         $class[] = $current_order;
                                 } else {
-                                        $order = $desc_first ? 'desc' : 'asc';
+                                        if( in_array( strtolower($desc_first), array('desc', 'asc'), true ) )
+                                                $order = strtolower( $desc_first );
+                                        else
+                                                $order = $desc_first ? 'desc' : 'asc';
+
                                         $class[] = 'sortable';
-                                        $class[] = $desc_first ? 'asc' : 'desc';
+                                        $class[] = $order === 'desc' ? 'asc' : 'desc';
                                 }
 
                                 $column_display_name = '<a href="' . esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ) . '"><span>' . $column_display_name . '</span><span class="sorting-indicator"></span></a>';