Sessions and session variables are not working - php

Question

I have a login script in Php. If the credentials are correct then the session is started, session variables are set and then redirected to the profile page. In the profile page, I have a script that redirects the user back to login page if they have not logged in.
Now, whenever I enter the correct credentials of the user and click on login, it redirects me back to the login page. To solve it, I commented out the code which was responsible for the redirection back to the login page. As a result, I got access to the profile page but I could not access the session variables.
And sometimes this code runs perfectly while sometimes it shows the above-stated problem.
The login code is as shown in the picture :
session_start();
require_once 'includes/config.php';
if(isset($_POST['login'])){
$user = trim($_POST['username']);
$pass = trim($_POST['password']);
$ch = $_POST['position'];
$stmt = $db->prepare("SELECT C_Name, PAN_id, Password FROM master_registration WHERE PAN_id = ?");
$stmt->bindParam(1,$user);
$stmt->execute();
$row = $stmt->fetch();
$username = $row["PAN_id"];
$Name = $row["C_Name"];
$hash = $row["Password"];
if(password_verify($pass, $hash)) {
session_start();
$_SESSION["loggedin"] = true;
$_SESSION["username"] = $username;
$_SESSION["Name"] = $Name;
header("Location: main_folder/master/profile.php");
Login page code
The profile page code is as shown in the picture:
session_start();
require_once '../../includes/config.php';
if(!isset($_SESSION['loggedin']) && $_SESSION['loggedin'] !== true){
header("location:../../index.php");
exit;
}
$user = $_SESSION['username'];
profile page code
The seems fine, but there is a problem in sessions, plus it works in localhost but when I hosted in CPanel the problem starts.
Please help anyone...

Answer 1

Sometimes the Cpanel need config on the PHP SESSION, php.ini
First yo can check the CPanel session.save_path and enabel output_buffering .
to used phpinfo()
Your code its correct. but if try session_start(); to inculed the config.php file

Answer 2

Change your profile pic code with this code...
Your logic is incorrect thatswhy you are redirected everytime
if(!$_SESSION['loggedin']) {
header("location: ../../index.php");
exit() ;
}