session is not working

[malatamil]

after login i want to display logout and username. but here if i login again its showing login. please some help me

index.php

<?php
session_start();
$city=$_SESSION['city'];

$userl = $_SESSION['username1'];


<?php
if(!isset($userl) == '')
{ ?>
<div class="header_nav_left">Welcome <?php echo $userl; ?> | <a href="logout.php" id="clicklogin" title="Logout" onClick="NewWindow(this.href,'loginwindow','500','500','no','center');return false" onFocus="this.blur()">Logout</a></div>
<?php } 
else
{ ?>
    <div class="header_nav_left">Welcome Guest | <a href="login.php" id="clicklogin" title="Login" onClick="NewWindow(this.href,'loginwindow','500','500','no','center');return false" onFocus="this.blur()">Login</a></div>
<?php } ?>

login.php

session_start();
$business = $_GET['Business'];
$article = $_GET['article'];
$abusiness = $_GET['abusiness'];

$myusername = $_POST['username1']; 
$mypassword = $_POST['password1']; 
$are_you = $_POST['are_you'];

$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql = "SELECT * FROM `register` WHERE Username='$myusername' AND Password='$mypassword' AND Activation=''";
$result = mysql_query($sql); //are_you_an='$are_you'
$r = mysql_fetch_array($result);
$count = mysql_num_rows($result);
if($count == 1)
{
    if($r['Activation'] == '')
    {
        echo '<script>alert("A Confirmation '.$r['EmailId'].' has been sent to Email Please click on the Activation Link to Activate your Namshimoga Account");
            window.location="login.php?Business=Business";</script>';
    }
        // If result matched $myusername and $mypassword, table row must be 1 row
        elseif($r['are_you_an'] == 'Individual')
        {
            //if($r['are_you_an'] == 'Business')
            $userl = $_SESSION['username1'];
            $_SESSION['username1'] = $user1;
            session_register("username1");
            session_register("password1");

            echo '<script>window.location="addarticle.php?userid='.$r['Id'].'";</script>';

        }
        elseif($r['are_you_an'] == 'Business,Individual' )
        {
            if($_GET['Business'] == 'Business')
            {
                echo '<script>window.location="addbusiness.php?userid='.$r['Id'].'";</script>';
            }
    // Register $myusername, $mypassword and redirect to file "login_success.php"
            $userl = $_SESSION['username1'];
            $_SESSION['username1'] = $user1;
            session_register("username1");
            session_register("password1"); 

            echo '<script>window.location="addarticle.php?userid='.$r['Id'].'";</script>';
        }
        else 
        {
            echo '<script>alert("Wrong Username or Password");
            window.location="login.php?Business=Business";</script>';
        }
 }

[Adrian_5]

On index.php, at line 9 the if statement... if(isset($userl))

[toxicandy]

As Adrian was saying on line 9 the if statment is not going to work because you close the php mid way through to type the html. Try using one large <?php ?> tag and instead using echo to display the html. For example.

<?php
if(!isset($userl) == '')
{ 
    echo "<div class='header_nav_left'>Welcome" .  $userl . "| <a href='logout.php' id='clicklogin' title='Logout' onClick='NewWindow(this.href,'loginwindow','500','500','no','center');return false' onFocus='this.blur()'>Logout</a></div>";
} else {
    echo "<div class='header_nav_left'>Welcome Guest | <a href='login.php' id='clicklogin' title='Login' onClick='NewWindow(this.href,'loginwindow','500','500','no','center');return false' onFocus='this.blur()'>Login</a></div>";
} ?>

and so on like that to get it to work.