Add an example of howto create a DateTime object from a unix timestamp

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@295817 c90b9560-bf6c-de11-be94-00142212c4b1

reference/datetime/datetime/construct.xml

@@ -63,6 +63,20 @@ date_default_timezone_set('Europe/London');
 $datetime = new DateTime('2008-08-03 14:52:10');
 echo $datetime->format(DATE_ATOM);
 ?>
+]]>
+    </programlisting>
+   </example>
+
+   <example>
+    <title>Creating <classname>DateTime</classname> from a UNIX timestamp</title>
+    <para>
+     To create a <classname>DateTime</classname> object from a UNIX timestamp
+     use the <function>strtotime</function> <literal>@</literal> keyword.
+    </para>
+    <programlisting role="php">
+<![CDATA[
+$timestamp = $_SERVER["REQUEST_TIME"];
+$dt = new DateTime("@$timestamp");
 ]]>
     </programlisting>
    </example>