Welcome to the Lounge

<?php 

function check_login($con)
{
    
    if(isset($_SESSION['user_id']))
    {
        
        $id = $_SESSION["user_id"]
        $query = "select * from users where user_id = '$id' limit 1";

        $result = mysqli_query($con,$query);
        if($result && mysqli_num_rows($result) > 0)
        {
            $user_data = mysqli_fetch_assoc($result);
            return $user_data;
        }
    }
    //header('Location: loginsys.php');
    //die;
}