asked on

Change a Login link to Logout link using PHP

Haven't been able to get this to work.

I simply want a "Login" link to appear at the top of all of my pages. When user sucessfully logs in this link turns to "Logout". AND displays their "username".

What code do I use (don't want to rely on cookies) and where do I place it? Do I insert code on ALL of my pages? My pages consist of "Login Registration"; "Login", "Logout". They all work fine.

Thanks!

Kiran Paul VJ

after sucessfull verifcation of usrname and pass, you set a session say username

<?php
session_start();
if(isset($_SESSION['username']) && $_SESSION['username']!="")
echo("Login");
else
echo("Logout");?>

gamebits

You must keep track somehow of who is loggedin, so the basic is

if (isset($_COOKIE['USERNAME']) && isset($_COOKIE['PASSWORD']))
{
echo "<A HREF=\"logout.php\">Logout</a>
}
else
{
echo "<A HREF=\"login.php\">Login</a>
}

Of course you could use session as well.

Kiran Paul VJ

sorry, interchanged login and logout in above code

and if there is link you can try something like

<?php
session_start();
if(isset($_SESSION['username']) && $_SESSION['username']!="")
{
echo("<a href='logout.php'>Logout</a><br />");
echo($_SESSION['username']);// displays username
}
else
{
echo("Login");
}
?>

geist62

ASKER

Thanks! What I'm trying to understand is where to place your code kiranvj. If I want the link on every web page do I simply insert it a the top of every page?

Regards!

ASKER CERTIFIED SOLUTION

Kiran Paul VJ

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SOLUTION

gamebits

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Kiran Paul VJ

@geist62,
you can also do as gamebits mentioned

so ur code will look like

<a href='somepage.php'>Some Link</a>
include('login_logout.php');
<a href='some_other_link.php'>Some other link</a>

//login_logout.php
<?php
if(isset($_SESSION['username']) && $_SESSION['username']!="")
{
echo("<a href='logout.php'>Logout</a> ");
echo($_SESSION['username']);// displays username
}
else
{
echo("<a href='login.php'>Login</a> ");
}
?>

if you include the code as a file you dont need to change it in all files if there is a change in code.