Ticket #21779: 21779.3.patch

wp-includes/query.php

@@ -1787 +1787 @@
                 // Tag stuff
                 if ( '' != $q['tag'] && !$this->is_singular && $this->query_vars_changed ) {
                         if ( strpos($q['tag'], ',') !== false ) {
-                                $tags = preg_split('/[,\s]+/', $q['tag']);
+                                $tags = preg_split('/[,\r\n\t ]+/', $q['tag']);
                                 foreach ( (array) $tags as $tag ) {
                                         $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
                                         $q['tag_slug__in'][] = $tag;
                                 }
-                        } else if ( preg_match('/[+\s]+/', $q['tag']) || !empty($q['cat']) ) {
-                                $tags = preg_split('/[+\s]+/', $q['tag']);
+                        } else if ( preg_match('/[+\r\n\t ]+/', $q['tag']) || !empty($q['cat']) ) {
+                                $tags = preg_split('/[+\r\n\t ]+/', $q['tag']);
                                 foreach ( (array) $tags as $tag ) {
                                         $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
                                         $q['tag_slug__and'][] = $tag;