Ticket #43056: canonical.php.patch

src/wp-includes/canonical.php

@@ -664 +664 @@
                 $where = $wpdb->prepare( 'post_name LIKE %s', $wpdb->esc_like( get_query_var( 'name' ) ) . '%' );
 
                 // if any of post_type, year, monthnum, or day are set, use them to refine the query
-                if ( get_query_var( 'post_type' ) ) {
-                        $where .= $wpdb->prepare( ' AND post_type = %s', get_query_var( 'post_type' ) );
+                $post_type = get_query_var( 'post_type' );
+
+                if ( $post_type ) {
+                        if ( is_array( $post_type ) ) {
+                                $where .= " AND post_type IN ('" . join( "', '", esc_sql( $post_type ) ) . "')";
+                        } else {
+                                $where .= $wpdb->prepare( ' AND post_type = %s', get_query_var( 'post_type' ) );
+                        }
                 } else {
                         $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')";
                 }