Add a clarifying comment.

cakephp · Nov 7, 2015 · 0043d2f · 0043d2f
1 parent 2d6b59d
commit 0043d2f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/Collection/CollectionTrait.php b/src/Collection/CollectionTrait.php
@@ -470,6 +470,8 @@ public function toArray($preserveKeys = true)
             $items = $iterator->getArrayCopy();
             return $preserveKeys ? $items : array_values($items);
         }
+        // RecursiveIteratorIterator can return duplicate key values causing
+        // data loss when converted into an array
         if ($preserveKeys && get_class($iterator) === 'RecursiveIteratorIterator') {
             $preserveKeys = false;
         }