Ticket #4943: get_posts_category_list_and_exclusion.diff

wp-includes/post.php

@@ -178 +178 @@
         else
                 parse_str($args, $r);
 
-        $defaults = array('numberposts' => 5, 'offset' => 0, 'category' => 0,
+        $defaults = array('numberposts' => 5, 'offset' => 0, 'category' => '', 'category_exclude' = 0,
                 'orderby' => 'post_date', 'order' => 'DESC', 'include' => '', 'exclude' => '',
                 'meta_key' => '', 'meta_value' =>'', 'post_type' => 'post', 'post_status' => 'publish', 'post_parent' => 0);
         $r = array_merge($defaults, $r);
         extract($r, EXTR_SKIP);
         $numberposts = (int) $numberposts;
         $offset = (int) $offset;
-        $category = (int) $category;
+        // $category = (int) $category; should remain textual
+        $category_exclude = ( 1 == (int)$category_exclude ? 'NOT' : '');
         $post_parent = (int) $post_parent;
 
         $inclusions = '';
         if ( !empty($include) ) {
                 $offset = 0;    //ignore offset, category, exclude, meta_key, and meta_value, post_parent if using include
-                $category = 0;
+                $category = '';
                 $exclude = '';
                 $meta_key = '';
                 $meta_value = '';
@@ -232 +233 @@
         $query .= empty( $post_type ) ? '' : "AND post_type = '$post_type' ";
         $query .= empty( $post_status ) ? '' : "AND post_status = '$post_status' ";
         $query .= "$exclusions $inclusions " ;
-        $query .= empty( $category ) ? '' : "AND ($wpdb->posts.ID = $wpdb->post2cat.post_id AND $wpdb->post2cat.category_id = " . $category. ") ";
+        $query .= empty( $category ) ? '' : "AND ($wpdb->posts.ID = $wpdb->post2cat.post_id AND $wpdb->post2cat.category_id $category_exclude IN (" . $category. ")) ";
         $query .= empty( $post_parent ) ? '' : "AND $wpdb->posts.post_parent = '$post_parent' ";
         $query .= empty( $meta_key ) | empty($meta_value)  ? '' : " AND ($wpdb->posts.ID = $wpdb->postmeta.post_id AND $wpdb->postmeta.meta_key = '$meta_key' AND $wpdb->postmeta.meta_value = '$meta_value' )";
         $query .= " GROUP BY $wpdb->posts.ID ORDER BY " . $orderby . ' ' . $order;