PHP会话将无法保存

Question

I've seen similar questions here but none of the solutions work for me. I am running php 5.6 in WAMP and localhost. When the user logs in correctly, I start the session with session_start() and set $_SESSION['user'] to $_POST['username'] , and then i use header('Location: home.php') . home.php starts with session_start() function, and then i check if the $_SESSION['user'] is set. If it isn't, I redirect to the login page. However, even when I log in with valid password and email, it always redirects me to the login page for reasons unkown. I tried to echo the $_SESSION['user'] , but it just says that it's undefined. How do I fix this problem?

Answer 1

This is how I do it:

include('dbconnect.php'); //php with server connection detail
session_start();

$user_check = $_SESSION['login_user'];

$ses_sql = mysqli_query($db,"SELECT username FROM users WHERE username = '$user_check' ");

$row = mysqli_fetch_array($ses_sql,MYSQLI_ASSOC);

$login_session = $row['username'];

if(!isset($_SESSION['login_user'])){
    header("location:login.php");
}

Answer 2

1. maybe you cannot set 'session_auto_start = on' in php.ini
2. First check the php.ini session_save_path in existence, and there is no comment out if there are general default in Widnows is c:\\windows\\tmp, the directory is not allowed to read other users by default.and Set folder for everyone to read writable

Answer 3

make sure your php.ini file have session.autostart = On

If you're using apache, and have the right Options, you can enable session.auto_start with a .htaccess file containing this line: php_flag session.auto_start 1

do session_start() on the top of everything.

Answer 4

We usually put session_start(); at the header.php , The problem now is that you've assigned $_POST['username'] to a session , Which is wrong, We use the $_POST[''] to retrieve data from the database , So you have to type your SELECT query and get the username from username row inside the database then assign the row data to a session like this $_SESSION['username'] = $row['username'];

So in brief, Your mistake is using $_POST['username'] instead of SELECT ing the data from your database using $_POST then assigning it as session like this $_SESSION['username'] = $row['username'];