how do I display the logged-in user session that is in login.php that appear to the coba.php page-CodePudding

I can't bring up the logged-in user session in login.php to the coba.php page and there is an error "undefined array key" in coba.php. how do I make it so that in coba.php the error does not appear and can bring up the logged-in user session in the form of the username

login.php

<?php

session_start();

include "koneksi.php";


    $username=$_POST['username'];
    $password=$_POST['password'];

    $cek_data= mysqli_query($conn,"select * from anggota where username='$username' and password='$password'");
    $cek = mysqli_num_rows($cek_data);

    if ($cek>0){
    $data = mysqli_fetch_assoc($cek_data);
        $_SESSION['username'] = $username;
        echo "Berhasil Login";

    }else {
        echo "Gagal Login";
    }



?>

coba.php

<?php 
session_start();

    echo $_SESSION['username'];
?>

I'm trying to get the user username into try.php without the error undefined array key "Username"

CodePudding user response：

It looks like the issue is that you are trying to access the 'username' key of the $_SESSION array in coba.php, but it is not set.

One possible solution to this problem is to check if the 'username' key is set in the $_SESSION array before trying to access it. You can do this by using the isset() function in PHP, which returns a boolean indicating whether the given variable is set and is not NULL.

Here's how you can modify the code in coba.php to check if the 'username' key is set:

<?php 
session_start();

if (isset($_SESSION['username'])) {
  echo $_SESSION['username'];
} else {
  echo "Username is not set.";
}
?>

If the 'username' key is set, this code will print the username. If it is not set, it will print a message indicating that the key is not set.

I hope this helps! Let me know if you have any other questions.

CodePudding user response：

To bring the logged-in user's session from the login.php page to the coba.php page, you need to start the session in coba.php using session_start(). This will allow you to access the session variables that were set in login.php.

To fix the "undefined array key" error, you need to make sure that the $_SESSION['username'] variable is set before trying to access it. You can do this by checking if the $_SESSION['username'] variable is set before trying to access it in coba.php

<?php 
session_start();

if (isset($_SESSION['username'])) {
    echo $_SESSION['username'];
} else {
    // display an error message or redirect to the login page
}
?>

This code will start the session, and then check if the $_SESSION['username'] variable is set. If it is set, it will print the value of the $_SESSION['username'] variable. If it is not set, it will display an error message or redirect the user back to the login page