issue with undefined variables with PHP 4.06

Hi I have just reinstalled my win2k system and installed the latest version of PHP (4.06), now when I run a lot of my old scripts I get errors like the one below, when I access the page before posting any data to it. The example below is taken straight from a tutorial site. I'm not sure if this is a change in PHP since 4.01 which I had been using or what ? Can anyone help please ?! Thanks Phil Warning: Undefined variable: name in u:\inetpub\wwwroot\php\form5.php on line 7 <html> <body><h1>My Example Form</h1> <form action="form5.php" method="POST"> Name: <input type="text" name="name"> Age: <input type="text" name="age"> </form> <?if($name):?> Hi <?echo $name?>, you are <?echo $age?> years old <?endif?> </body></html>