Ticket #35692: 35692.1.diff

query.php

@@ -1457 +1457 @@
                         , 'fields'
                         , 'menu_order'
                         , 'embed'
+                        , 'seed'
                 );
 
                 foreach ( $keys as $key ) {
@@ -1568 +1569 @@
          *                                                 return posts containing 'pillow' but not 'sofa'.
          *     @type int          $second                  Second of the minute. Default empty. Accepts numbers 0-60.
          *     @type bool         $sentence                Whether to search by phrase. Default false.
+         *     @type int                  $seed                                    A seed value to pass to MySQL's `RAND()` function
          *     @type bool         $suppress_filters        Whether to suppress filters. Default false.
          *     @type string       $tag                     Tag slug. Comma-separated (either), Plus-separated (all).
          *     @type array        $tag__and                An array of tag ids (AND in).
@@ -1614 +1616 @@
                 $qv['pagename'] = trim( $qv['pagename'] );
                 $qv['name'] = trim( $qv['name'] );
                 $qv['title'] = trim( $qv['title'] );
+                $qv['seed'] =  absint( $qv['seed'] );
                 if ( '' !== $qv['hour'] ) $qv['hour'] = absint($qv['hour']);
                 if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);
                 if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);
@@ -2321 +2324 @@
          *
          * @global wpdb $wpdb WordPress database abstraction object.
          *
-         * @param string $orderby Alias for the field to order by.
+         * @param string  $orderby Alias for the field to order by.
+         * @param integer $seed    Seed value for random ordering
          * @return string|false Table-prefixed value to used in the ORDER clause. False otherwise.
          */
-        protected function parse_orderby( $orderby ) {
+        protected function parse_orderby( $orderby, $seed ) {
                 global $wpdb;
 
                 // Used to filter values.
@@ -2368 +2372 @@
                                 $orderby_clause = "$wpdb->posts.{$orderby}";
                                 break;
                         case 'rand':
-                                $orderby_clause = 'RAND()';
+                                $seed_value = '';
+                                if( $seed ) {
+                                        $seed_value = $seed;
+                                }
+                                $orderby_clause = 'RAND(' . esc_sql( $seed_value ) . ')';
                                 break;
                         case $primary_meta_key:
                         case 'meta_value':
@@ -2970 +2978 @@
                         if ( is_array( $q['orderby'] ) ) {
                                 foreach ( $q['orderby'] as $_orderby => $order ) {
                                         $orderby = addslashes_gpc( urldecode( $_orderby ) );
-                                        $parsed  = $this->parse_orderby( $orderby );
+                                        $parsed  = $this->parse_orderby( $orderby, $q['seed'] );
 
                                         if ( ! $parsed ) {
                                                 continue;
@@ -2985 +2993 @@
                                 $q['orderby'] = addslashes_gpc( $q['orderby'] );
 
                                 foreach ( explode( ' ', $q['orderby'] ) as $i => $orderby ) {
-                                        $parsed = $this->parse_orderby( $orderby );
+                                        $parsed = $this->parse_orderby( $orderby, $q['seed'] );
                                         // Only allow certain values for safety.
                                         if ( ! $parsed ) {
                                                 continue;