[RESOLVED] Message in PHP script is displayed in other server

[dee-u]

This is the code, somehow I noticed that in the other server that I have tried it the messages (Please specify email., Incorrect email format., etc...) are being displayed, why is this?

<?php if(isset($_GET['empty_email'])){?> 
Please specify email.<br /> 
<?php ;}?>

<?php if(isset($_GET['invalid_email'])){?> 
Incorrect email format.<br /> 
<?php ;}?>  

<?php if(isset($_GET['empty_captcha'])){?> 
Please specify verification code.<br /> 
<?php ;}?> 

<?php if(isset($_GET['wrong_code'])){?> 
Wrong verification code.<br /> 
<?php ;}?> 

<?php if(isset($_GET['success'])){?> 
Comment successfully sent.<br /> 
<?php ;}?>

I'm really no PHP developer and most of the stuffs I used are from searching the web so I am not sure of the answer. Thanks for anyone who could point out what I am doing wrong.