SESSION['username'] is not set

Question

I have a form which takes the username and puts it in a SESSION after submit. Now when I check if SESSION username exists and echo it, it shows me the result perfectly, but when I want to redirect to another page if the same SESSION is not empty it tells me that the SESSION doesn't exist.

I don't get it?!

if(isset($_POST['submit'])){
    $user = $_POST['username']; 
    $_SESSION['username'] = $user;

    echo $_SESSION['username']; // This shows me the result perfectly

    if(isset($_SESSION['username'])){
    header('location:index.php?page=dashboard&user='.$_SESSION['username'].'');
    }
    else{
    echo "SESSION user isn't set."; // This is the result I get from the isset()
    }
}

Value 10106 is the value I want to get in this part, my page prints this:

SESSION user isn't set10106

It does the redirect but can't load anything because SESSION is empty, but when I click on my button logout it does show me the value in the URL:

action=logout&user=10106

So that means the session is set. But the isset() still gives me a false result. I didn't forget the session_start(), else my echo wouldn't give me result either.

This the form I submit:

<form action='index.php?page=login' method='post'>
    <table id='login'>
       <tr>
          <td colspan=2><br></td>
       </tr>
       <tr>
          <td>User:</td>
          <td><input type='username' name='username'></td>
       </tr>
       <tr>
          <td>Password:</td>
          <td><input type='password' name='password'></td>
       </tr>
       <tr>
          <td colspan=2><input type='submit' name='submit'></td>
       </tr>
    </table>
</form>

EXTRA INFO:

When I click submit, it stays on the same page, the URL didnt changed but my menu did. The menu changes when SESSION username is set, so when I click on another URL in the menu it shows me the SESSION in the URL.

index.php?page=new_call&user=10106

EDIT: OK, so the problem isn't the SESSION which isn't set, it's the redirect that doesn't work. After submitting the form it should redirect but stays on the same page right now.

Answer 1

session_start();
$user = "admin";

if(!isset($_SESSION['user_name'])){
    if($_POST){
        if($_POST['username'] == $user){
            $_SESSION['user_name'] = $user;
        } else {
            echo "SESSION user isn't set.<br>";
        }

    }
    echo "input your session username ";
} else {
    echo  "Youve got Session " . $_SESSION['user_name'];
}

try it :D

Answer 2

I think you need to structure your code to something like this:

<?php
session_start();
if(isset($_GET['page'])){
    $page=$_GET['page'];
}
else{
    $page="";
}

if(isset($_POST['submit'])){ //log in submit
    $user = $_POST['username']; 
    $_SESSION['username'] = $user;

    echo $_SESSION['username']; // This shows me the result perfectly

    if(isset($_SESSION['username']) && !empty($_SESSION['username'])){
    header('location:index.php?page=dashboard&user='.$_SESSION['username'].'');
    }
    else{
    echo "SESSION user isn't set."; // This is the result I get from the isset()
    }
}
if($page=="dashboard"){ //dashboard page

?>
Dashboard page<br>
Your session: <?php echo($_SESSION['username']); ?>
<?php
}
else{ //login page
?>
<form action='' method='post'>
    <table id='login'>
       <tr>
          <td colspan=2><br></td>
       </tr>
       <tr>
          <td>User:</td>
          <td><input type='username' name='username'></td>
       </tr>
       <tr>
          <td>Password:</td>
          <td><input type='password' name='password'></td>
       </tr>
       <tr>
          <td colspan=2><input type='submit' name='submit'></td>
       </tr>
    </table>
</form>
<?php
}
?>