Change constructor from PHP4 to modern style in example.

By naitsirch.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@341814 c90b9560-bf6c-de11-be94-00142212c4b1

reference/classobj/functions/get-class-vars.xml

@@ -97,7 +97,7 @@ class myclass {
     private $var4;
 
     // constructor
-    function myclass() {
+    function __construct() {
         // change some properties
         $this->var1 = "foo";
         $this->var2 = "bar";