Ticket #9124: 9124.2.diff

wp-includes/query.php

@@ -2146 +2146 @@
                 if ( ! empty($q['meta_key']) )
                         $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s ", $q['meta_key']);
                 if ( ! empty($q['meta_value']) ) {
-                        if ( ! isset($q['meta_compare']) || empty($q['meta_compare']) || ! in_array($q['meta_compare'], array('=', '!=', '>', '>=', '<', '<=')) )
+                        if ( ! isset($q['meta_compare']) || empty($q['meta_compare']) || ! in_array($q['meta_compare'], array('=', '!=', '>', '>=', '<', '<=', 'in')) )
                                 $q['meta_compare'] = '=';
-
-                        $where .= $wpdb->prepare("AND $wpdb->postmeta.meta_value {$q['meta_compare']} %s ", $q['meta_value']);
+                        if ( 'in' == $q['meta_compare'] ) {
+                                if ( !is_array($q['meta_value']) )
+                                        $q['meta_value'] = preg_split('!,\s+!', $q['meta_value']);
+                                $meta_field_types = rtrim(str_repeat('%s,', count($q['meta_value'])), ',');
+                                $where .= $wpdb->prepare("AND $wpdb->postmeta.meta_value IN($meta_field_types) ", $q['meta_value']);
+                                unset($meta_field_types);
+                        } else {
+                                $where .= $wpdb->prepare("AND $wpdb->postmeta.meta_value {$q['meta_compare']} %s ", $q['meta_value']);
+                        }
+
                 }
 
                 // Apply filters on where and join prior to paging so that any