Add VIP: comment for orderby sanitization on users Indexable

#112

includes/classes/Indexable/User/User.php

@@ -728,18 +728,13 @@ public function query_db( $args ) {
 			$args['order'] = 'desc';
 		}
 
-		/**
-		 * Sanitize the ORDER BY clause
-		 */
+		// VIP: Sanitize orderby in advance to avoid quotes to work with mariadb since $wpdb->prepare quotes placeholders
 		$orderby_args = sanitize_sql_orderby( "{$args['orderby']} {$args['order']}" );
 		$orderby      = $orderby_args ? sprintf( 'ORDER BY %s', $orderby_args ) : '';
 
 		/**
 		 * WP_User_Query doesn't let us get users across all blogs easily. This is the best
 		 * way to do that.
-		 *
-		 * The $wpdb->prepare will quote placeholders.
-		 * We are sanitizing orderby in advance and putting it as a variable to avoid quotes.
 		 */
 		// @codingStandardsIgnoreStart
 		$objects = $wpdb->get_results( $wpdb->prepare( "SELECT SQL_CALC_FOUND_ROWS ID FROM {$wpdb->users} {$orderby} LIMIT %d, %d", (int) $args['offset'], (int) $args['number'] ) );