Ticket #11330: empty-search-string.diff

wp-includes/query.php

@@ -1480 +1480 @@
                 } else {
                 // Look for archive queries. Dates, categories, authors, search, post type archives.
 
-                        if ( !empty($qv['s']) ) {
+                        if ( isset( $qv['s'] ) )
                                 $this->is_search = true;
-                        }
 
                         if ( '' !== $qv['second'] ) {
                                 $this->is_time = true;
@@ -2203 +2202 @@
                                 if ( !is_user_logged_in() )
                                         $search .= " AND ($wpdb->posts.post_password = '') ";
                         }
+                } elseif ( $this->is_search ) {
+                        $search = 'AND 0';
                 }
 
                 // Allow plugins to contextually add/remove/modify the search section of the database query
@@ -2530 +2531 @@
                 }
 
                 // Comments feeds
-                if ( $this->is_comment_feed && ( $this->is_archive || $this->is_search || !$this->is_singular ) ) {
+                if ( $this->is_comment_feed && ( $this->is_archive || ( $this->is_search && ! empty( $q['s'] ) ) || !$this->is_singular ) ) {
                         if ( $this->is_archive || $this->is_search ) {
                                 $cjoin = "JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID = $wpdb->posts.ID) $join ";
                                 $cwhere = "WHERE comment_approved = '1' $where";