adding derick's comment

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@153077 c90b9560-bf6c-de11-be94-00142212c4b1

appendices/migration5.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.10 $ -->
+<!-- $Revision: 1.11 $ -->
  <appendix id="migration5">
   <title>Migrating from PHP 4 to PHP 5</title>
 
@@ -66,6 +66,9 @@
       the CLI version will now always populate the global $argc and $argv
       variables.
     </simpara></listitem>
+    <listitem><simpara>
+      An object with no properties is no longer considered "empty".
+    </simpara></listitem>
     <listitem><simpara>
       Classes must be declared before used.
     </simpara></listitem>
@@ -82,6 +85,26 @@ var_dump(strrpos('ABCDEF','DEF')); //int(3)
 
 var_dump(strrpos('ABCDEF','DAF')); //bool(false)
 ?>
+]]>
+     </programlisting>
+    </example>
+   </para>
+   <para>
+    <example>
+     <title>An object with no properties is no longer considered "empty"</title>
+     <programlisting role="php">
+<![CDATA[
+<?php
+class test { }
+$t = new test();
+
+var_dump(empty($t)); // echo bool(false)
+
+if (!$t) {
+    // Will be executed
+}
+?>
+
 ]]>
      </programlisting>
     </example>
@@ -536,6 +559,13 @@ Action application/x-httpd-php "/php/php-cgi.exe"
     PostgreSQL). The SQLite library reads and writes directly to and from the
     database files on disk.
    </para>
+
+   <note>
+    <para>
+     The <link linkend="ref.tidy">Tidy</link> extension has also changed its
+     API completly.
+    </para>
+   </note>
   </section>
 
   <section id='migration5.oop'>