diff --git a/reference/datetime/dateinterval.xml b/reference/datetime/dateinterval.xml
index 08db86b969..115cb8d5c0 100644
--- a/reference/datetime/dateinterval.xml
+++ b/reference/datetime/dateinterval.xml
@@ -159,8 +159,9 @@
      <term><varname>days</varname></term>
      <listitem>
       <para>
-       Total number of days the interval spans. If this is unknown,
-       <varname>days</varname> will be &false;.
+       Total number of days between the starting and ending dates
+       in a <function>DateTime::diff</function> calculation.
+       <varname>days</varname> will be &false; in other circumstances.
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/datetime/dateinterval/construct.xml b/reference/datetime/dateinterval/construct.xml
index 411fff9906..915a45734f 100644
--- a/reference/datetime/dateinterval/construct.xml
+++ b/reference/datetime/dateinterval/construct.xml
@@ -130,7 +130,7 @@
 <?php
 
 $interval = new DateInterval('P2Y4DT6H8M');
-print_r($interval);
+var_dump($interval);
 
 ?>
 ]]>
@@ -138,17 +138,24 @@ print_r($interval);
     &example.outputs;
     <screen role="php">
 <![CDATA[
-DateInterval Object
-(
-    [y] => 2
-    [m] => 0
-    [d] => 4
-    [h] => 6
-    [i] => 8
-    [s] => 0
-    [invert] => 0
-    [days] => 0
-)
+object(DateInterval)#1 (8) {
+  ["y"]=>
+  int(2)
+  ["m"]=>
+  int(0)
+  ["d"]=>
+  int(4)
+  ["h"]=>
+  int(6)
+  ["i"]=>
+  int(8)
+  ["s"]=>
+  int(0)
+  ["invert"]=>
+  int(0)
+  ["days"]=>
+  bool(false)
+}
 ]]>
     </screen>
    </example>