diff --git a/language/functions.xml b/language/functions.xml
index f34ba9a41c..33ae9a8859 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.47 $ -->
+<!-- $Revision: 1.48 $ -->
  <chapter id="language.functions">
   <title>Functions</title>
 
@@ -249,7 +249,27 @@ Making a cup of cappuccino.
 Making a cup of espresso.
      </screen>
     </para>
- 
+    <para>
+    Also PHP allows you to use arrays and special type NULL as  
+    default values, for example:
+     <example>
+      <title>Using non-scalar types as default values</title>
+      <programlisting role="php">
+<![CDATA[
+<?php
+function makecoffee ($types = array("cappuccino"), $coffeeMaker = NULL)
+{
+    $device = is_null($coffeeMaker) ? "hands" : $coffeeMaker;
+    return "Making a cup of ".join(", ", $types)." with $device.\n";
+}
+echo makecoffee ();
+echo makecoffee (array("cappuccino", "lavazza"), "teapot");
+?>
+]]>
+      </programlisting>
+     </example>
+    
+    </para>
     <simpara>
      The default value must be a constant expression, not (for
      example) a variable, a class member or a function call.