Cookie deleting problem

[markkanning]

Hey folks,

I'm having trouble with a cookie setting/deleting function in one of my scripts for logging in and out of a website CMS. In testing it, I've found that if I login once, then logout, the 2 cookies in question(one being set at the point of login and another being set by a session that MySQL querries are being fed from) will successfully be deleted as intended. However, a second login and logout will NOT delete the same cookies. Is there something else I'm not considering, something else being cached that could be causing this?

 

Here's the cookie setting/deleting code:

if (isset($_REQUEST[uid]) AND !isset($_COOKIE[cookieid])) {
$grabuser = "SELECT recID FROM user WHERE username = '$_REQUEST[uid]' AND password = '$_REQUEST[pwd]'";
$result = @mysql_query($grabuser);
sql_query($result, "$errors[03]");

if (@mysql_num_rows($result) == 0) {
	include ($_SERVER['DOCUMENT_ROOT'].'/layout.php');
	adminHeader();
	warningSecureArea();
	adminBoxSecurity();
	error ("$errors[04]");
	include ($_SERVER['DOCUMENT_ROOT'].'/login_form.php');
	adminFooter();
	exit();
} 

//If username/password match, set cookie to the value "$userid" and name it "cookieid"
else {
	$userid = @mysql_result($result,0,"recID");
	$processing_login = true;
	$cookie_setter = setcookie ("cookieid", $userid, time()+$maxlifetime);
       }

}

//Delete "cookieid" and "PHPSESSID" on logout
if ($_REQUEST[action] == "logout") {
setcookie ("cookieid", "", time()-$maxlifetime);
setcookie ("PHPSESSID", "", time()-$maxlifetime);
include ($_SERVER['DOCUMENT_ROOT'].'/layout.php');
adminHeaderRefresh();
echo "<table border=\"0\" cellpadding=\"2\" cellspacing=\"0\" align=\"center\" style=\"width:38px;margin:50px auto 0 auto;\"><tr><td><img src=\"/images/lockiconfilling.gif\"></td></tr></table>";
adminBoxSecurity();
echo "<center><h1>LOGGING OUT...</h1><br>If this page does not refresh in 3 seconds, <a href=\"/admin.php\">click here</a>.</center>";
adminFooter();
exit();
}

Anyone got any ideas as to what I could add to make sure a second logout would be successful?

 

Mark