- <example> needs a title in it befor <programlisting> to work => build

braking error corrected
 - PHP3 and PHP4 are PHP 3 and PHP 4
 - linking in global references
 - adding comment to example


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@70901 c90b9560-bf6c-de11-be94-00142212c4b1

appendices/migration4.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.19 $ -->
+<!-- $Revision: 1.20 $ -->
  <appendix id="migration4">
   <title>Migrating from PHP 3 to PHP 4</title>
 	
@@ -427,24 +427,27 @@ php_admin_flag [PHP directive name] [On|Off]
    <title>Handling of global variables</title>
    <para>
     While handling of global variables had the focus on to be easy in
-    PHP3 and early versions of PHP4, the focus has changed to be more
-    secure. While in PHP3 following example worked fine, in PHP4 it
+    PHP 3 and early versions of PHP 4, the focus has changed to be more
+    secure. While in PHP 3 the following example worked fine, in PHP 4 it
     has to be unset($GLOBALS["id"]);. This is only one issue of global
     variable handling. You should always have used $GLOBALS, with
-    newer versions of PHP4 you are forced to do so in most cases.
+    newer versions of PHP 4 you are forced to do so in most cases.
+    Read more on this subject in the <link linkend="references.global">
+    <literal>global</literal> references section</link>.
    </para>
    <example>
+    <title>Migration of global variables</title>
     <programlisting role="php">
 <![CDATA[
 <?php
-$id=1;
+$id = 1;
 function test()
 {
-        global $id;
-	unset($id);
+    global $id;
+    unset($id);
 }
 test();
-echo($id);
+echo($id); // This will print out 1 in PHP 4
 ]]>
     </programlisting>
    </example>