From ba819856bba5372c5624f89232f08d4b7081d713 Mon Sep 17 00:00:00 2001
From: Kristina Chodorow <kristina@php.net>
Date: Thu, 18 Nov 2010 19:10:04 +0000
Subject: [PATCH] addendum on collections w/out _ids

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@305515 c90b9560-bf6c-de11-be94-00142212c4b1
---
 reference/mongo/mongocollection/find.xml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/reference/mongo/mongocollection/find.xml b/reference/mongo/mongocollection/find.xml
index 5cd61a60d1..2ef13415fb 100644
--- a/reference/mongo/mongocollection/find.xml
+++ b/reference/mongo/mongocollection/find.xml
@@ -129,6 +129,13 @@ $array = iterator_to_array($cursor);
     the results into memory, so do not do this for result sets that are larger
     than memory!
    </para>
+   <para>
+    Also, certain system collections do not have an <literal>_id</literal> 
+    field.  If you are dealing with a collection that might have documents 
+    without <literal>_id</literal>s, pass &false; as the second argument to
+    <function>iterator_to_array</function> (so that it will not try to use the
+    non-existent <literal>_id</literal> values as keys).
+   </para>
   </example>
  </refsect1>