test

<?php
session_start();
include "db_conn.php";

if (isset($_POST['username']) && isset($_POST['password'])) {

    function validate($data){
        $data = trim($data);
        $data = stripslashes($data);
        $data = htmlspecialchars($data);
        return $data;
    }

    $uname = validate($_POST['username']);
    $pass = validate($_POST['password']);

    if (empty($uname)) {
        header("Location: index.php?error=User is required");
        exit();
    } elseif (empty($pass)) {
        header("Location: index.php?error=Password is required");
        exit();
    }

    $sql = "SELECT * FROM users WHERE user_name='$uname' AND passwords='$pass'";

    $result = mysqli_query($conn, $sql);

    if(mysqli_num_rows($result) === 1) {
        $row = mysqli_fetch_assoc($result);
        if($row['user_name'] === $uname && $row['password'] === $pass) {
          echo "Logged In!";
          $_SESSION['user_name'] = $row['user_name'];
          $_SESSION['name'] = $row['name'];
          $_SESSION['id'] = $row['id'];
          header("Location: home.php");
          exit();
        }
        else{
        header("Location:index.php?error=Incorrect User Name or Password");
        exit();
        }
    }
}
else {
    header("Location: index.php");
    exit();
}