Whyd isnt session id destoryed with this code?

[sgtpepper]

Here is my code:

<?
session_start();
$cookie_id=session_id();
require('connect.php');
mysql_query("INSERT INTO `completed_orders` (`shipping_name`,`shipping_address`,`shipping_city`,`shipping_state`,`shipping_zip`,`billing_name`,`billing_address`,`billing_city`,`billing_state`,`billing_zip`,`billing_phone`,`billing_email`,`cctype`,`ccnumber`,`expirydate`,`shipment_arrival`,`comments`,`cart_number`) VALUES ('$shipping_name','$shipping_address','$shipping_city','$shipping_state','$shipping_zip','$billing_name','$billing_address','$billing_city','$billing_state','$billing_zip','$billing_phone','$billing_email','$cctype','$ccnumber','$expirydate','$shipment_arrival','$comments','$cookie_id')");
session_unset();
session_destroy();
?>

Yet, everytime I go back to my shopping cart....with session_id is the same. Shouldnt this destory my current session? Wouldnt the next time session_start is called....a new session_id would be created. What am I doing wrong?

Thank you.

[travelbuff]

what you are doing is removing the session info server side. To remove it browser-side, try this:

unset($_COOKIE[session_name()]);

or

setcookie( session_name() ,"",0,"/");