Login Logout script

[newbie2php]

Can anyone tell me where i can find a simple script that looks to see if a user is logged in and if they are change a login link to logout

 

Here is the code that i put to start my session

 

if ($loggedin == true)
{
//set the login session variables, uname and logged	
session_start();
//optionally setting sessions as well as cookies. 
$HTTP_SESSION_VARS['username'] = $u;
$HTTP_SESSION_VARS['logged'] = true;
// setcookies
//if the user wants us to remember they are logged in...
if (isset($HTTP_POST_VARS['saved']) && $HTTP_POST_VARS['saved'] == "yes")
 {
	//set cookies here.  set for 1 week
	setcookie("checked", $HTTP_POST_VARS['saved'], time()+604800);
	setcookie("name", $u, time()+604800);// 1 week
	setcookie("pass", $p, time()+604800);// 1 week
} else 
{ // remove cookies by setting expiration to time in the past
	setcookie("checked", "", time()-1000);
	setcookie("name", "", time()-1000);
	setcookie("pass", "", time()-1000);
}
// send the successfully logged on visitor on their way...
header("Location:protected.php");
exit;

 

If anyone can help in anyway that would be great

[jonsjava]

seeing how I don't use cookies, I'm adding a single item, so I can write the code I know best:

if ($loggedin == true)
{
//set the login session variables, uname and logged	
session_start();
$_SESSION['is_logged_in'] = true;
//optionally setting sessions as well as cookies. 
$HTTP_SESSION_VARS['username'] = $u;
$HTTP_SESSION_VARS['logged'] = true;
// setcookies
//if the user wants us to remember they are logged in...
if (isset($HTTP_POST_VARS['saved']) && $HTTP_POST_VARS['saved'] == "yes")
 {
	//set cookies here.  set for 1 week
	setcookie("checked", $HTTP_POST_VARS['saved'], time()+604800);
	setcookie("name", $u, time()+604800);// 1 week
	setcookie("pass", $p, time()+604800);// 1 week
} else 
{ // remove cookies by setting expiration to time in the past
	setcookie("checked", "", time()-1000);
	setcookie("name", "", time()-1000);
	setcookie("pass", "", time()-1000);
}
// send the successfully logged on visitor on their way...
header("Location:protected.php");
exit;

Now, all you will need to do is something like this:

<?php
if ($_SESSION['is_logged_in'] == true){
$login_nav_item = "<a href='logout.php'>Logout</a>";
}
else{
$login_nav_item = "<a href='login.php'>Login</a>";
}

Next, in your navbar, where they have the option to login/logout, tell it to print $login_lav_item in that spot.