How to Block a user in PHP this is my code - php

Question

Here is the code which I am trying to block a user from my website. I am using MySQL database and I insert a Banned column in my user table and set their value 1 by default so tell me what I have to do. Table name of this section in MySQL database is Lectures So please help me as soon as possible.
<?php
session_start();
include("header.php");
include("conection.php");
//echo "lec name".$_SESSION["lecname"];
?>
<?php
if($banned == "1")
{
header("Location:lectureaccount.php");
}
else
{
header("Location:banned.php");
}?>
<?php
//if(isset($_SESSION["userid"]))
{
$lec_id = $_SESSION["userid"];
?>

Answer 1

you are doing good.
I am assuming you need to know what your SQL should be to get user data from the database.
<?php
session_start();
include("header.php");
include("conection.php");
//echo "lec name".$_SESSION["lecname"];
if(isset($_SESSION["userid"]))
{
$user_id = $_SESSION["userid"];
$con=mysqli_connect("example.com","username","password","database_name");
if (mysqli_connect_errno()){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT banned FROM Lectures where user_id = ".$user_id);
while($row = mysqli_fetch_array($result)){
$banned= $row['banned'];
}
mysqli_close($con);
if($banned == "1"){
header("Location:lectureaccount.php");
}
else{
header("Location:banned.php");
}
}
?>
<?php
//if(isset($_SESSION["userid"]))
{
$lec_id = $_SESSION["userid"];