如何通过创建SESSION创建一个使用PHP，MYSQL和HTML的登录系统[关闭]

Question

I need to create a login system, where once logged in, depending on the user type, users will be able to access certain pages. I also need to ensure that these users are able to logout of their accounts. I will be using a phpmyadmin database to store the user data, and their user type.

I have attempted to create this, however my current code does not work at all. Despite the users having a record in phpmyadmin, and with a defined user type; I am unable to login using their details. Instead I am presented with an error message, stating that the account cannot be located. I understand that the best way resolve this issue, is to implement a SESSION into my code, so users are not only able to login but their user type is remembered throughout their session.

How can I implement a SESSION into my code? Does anyone have any advice? Also I'm new to slack- please let me know if you have any questions on the above. Thanks

Answer 1

For using SESSION stuff you need to start every page.php by:

<?php session_start(); ?>

After what, you can cast some $_SESSION variable like:

$_SESSION['name'] = 'Alex';
$_SESSION['online'] = TRUE;

So you could use it :

<?php
   if($_SESSION['online']){ echo 'You are online';}
?>

And to disconnect someone from the sessions

<?php session_start();
  $_SESSION = array(); //to delete every $_SESSION variables
  session_destroy();
?>

For the rest of your ask, it's way too long to explain it there. You should follow some tutorial.