Displaying username after they have logged in (newbie)

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0

Hello im completely new to php and my question is how can i echo out the username of the person who has logged in, on the page they get sent to after logging in successfully?

ive got the login system working and everything but not sure where to write the session stuff etc.

This is my login2a.php

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


$conn = mysqli_connect('localhost', 'root', '', 'assign02');

$username = mysqli_real_escape_string($conn, $username);
$query = "SELECT password, salt
        FROM members
        WHERE username = '$username';";

$result = mysqli_query($conn, $query);

if(mysqli_num_rows($result) == 0) // User not found. So, redirect to login_form again.
{
    header('Location: login.html');
}

$userData = mysqli_fetch_array($result, MYSQL_ASSOC);
$hash = hash('sha256', $userData['salt'] . hash('sha256', $password) );


//check to see if the password is wrong if wrong redirect user to login forma again and if correct redirect to 
if($hash == $userData['password']) 
{
    header('Location: signed_in.php?username = $username ');
    //header('Location: login.html');
}else{ // Redirect to home page after successful login.
    //header('Location: signed_in.php?username=$username');
    header('Location: login.html');
}
?>

This is the page that i want their username to be displayed, this is just some parts of the website because its too big, what ive echoed is completely wrong i know but hope someone could help me with this problem. This page is the signed_in.php

 <div class="layout-978">
            <img id="content_background" src="Images/Background.png" />


                <div class="main_content">
                    <div id="top_sellers_title"> 
                        <div class="col7">

                            <!--username displayed to show logged in-->
                            <?php
                                if (isset($_SESSION['username'])){

                                    echo "<div id=\"welcome_msg\"> $username </div>";
                                }
                            ?>

asked 1 min ago

user3188359

1