diff --git a/functions/array.xml b/functions/array.xml
index b61e75ffa4..715cc60a79 100644
--- a/functions/array.xml
+++ b/functions/array.xml
@@ -249,6 +249,26 @@ array_keys ($array, "blue");  //  returns array (0, 3, 4)
       </programlisting>
      </example>
     </para>
+	<note>
+	 <para>
+	  This function was added to PHP4, below is an implementation for
+	  those still using PHP3.
+	  <example>
+	   <title>
+	    Implementation of <function>array_keys</function> for 
+		PHP3 users
+	   </title>
+	   <programlisting role="php">
+function array_keys($arr) {
+	$t = array();
+	while (list($k,$v) = each($arr))
+		$t[] = $k;
+	return $t;
+}
+	   </programlisting>
+	  </example>
+	 </para>
+	</note>
     <para>
      See also <function>array_values</function>.
     </para>
@@ -1004,6 +1024,26 @@ array_values ($array);    // returns array ("XL", "gold")
       </programlisting>
      </example>
     </para>
+	<note>
+	 <para>
+	  This function was added to PHP4, below is an implementation for
+	  those still using PHP3.
+	  <example>
+	   <title>
+	    Implementation of <function>array_values</function> for 
+		PHP3 users
+	   </title>
+	   <programlisting role="php">
+function array_values($arr) {
+	$t = array();
+	while (list($k,$v) = each($arr))
+		$t[] = $v;
+	return $t;
+}
+	   </programlisting>
+	  </example>
+	 </para>
+	</note>
    </refsect1>
   </refentry>