I have a create_event.php page. After having filled out the event details, the user has the possibility to login. After a successful login, I want the user to read 'Hello $username, you are logged-in now' on the same page (without reloading).
For the login process I use the following Ajax script:
$.ajax({
type : "POST",
url : "system/process_login.php",
data : query,
cache : false,
success : function(response) {
if (response === 'error') {
$('.feedback_message').text('Connection to database failed.');
};
if (response === 'failed') {
$('.feedback_message').text('Wrong login details.');
}
if (response === 'success') {
$('#step_login').text('Login successful!');
}
}
});
I am wondering how it is possible to initialize a session when the ajax login process is successful. In my process_login.php I write the following:
session_start();
require_once 'db.php';
// Get values sent via ajax and prepare them for database
$username = $db -> real_escape_string($_REQUEST['username']);
$password = $db -> real_escape_string($_REQUEST['password']);
// Hash password
$password_hashed = sha1($password);
// Check if login information is correct
$query = "SELECT * FROM users WHERE username='$username' AND password='$password_hashed'";
$results = $db -> query($query);
if ($db -> error) {
$response = 'error';
echo $response;
}
if (mysqli_num_rows($results) > 0) {
$_SESSION['username'] = $username;
$response = 'success';
echo $response;
} else {
$response = 'failed';
echo $response;
}
?>
My question: When the ajax login process is successful, will the $_SESSION['username'] variable be available? How can I retrieve it? In the top corner of the same page, i.e. my create_event.php, I want the user to read "Hello $username, you are logged-in now!"...
Following comments above (untested)
php
if (mysqli_num_rows($results) > 0) {
$user = $_SESSION['username']; // or, other method(s) of deriving accurate `username` / `user`
$response = $user;
echo $response;
}
js
success : function(response) {
if (response === 'error') {
$('.feedback_message').text('Connection to database failed.');
};
if (response === 'failed') {
$('.feedback_message').text('Wrong login details.');
}
if (response != "error" && response != "failed") {
$('#step_login').text("Hello" + response + ", you are logged-in now!");
}
}
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