Untitled

<?php
$mysql_hostname = "localhost";
$mysql_user = "root";
$mysql_password = "";
$mysql_database = "simple_login";
$prefix = "";
$bd = mysqli_connect($mysql_hostname, $mysql_user, $mysql_password, $mysql_database) or die("Could not connect database");
?>

<?php
    //Start session
    session_start();

    //Include database connection details
    require_once('connection.php');

    //Array to store validation errors
    $errmsg_arr = array();

    //Validation error flag
    $errflag = false;

    //Function to sanitize values received from the form. Prevents SQL injection
    function clean($str) {
        $str = @trim($str);
        if(get_magic_quotes_gpc()) {
            $str = stripslashes($str);
        }
        return mysqli_real_escape_string($str);
    }

    //Sanitize the POST values
    $username = clean($_POST['username']);
    $password = clean($_POST['password']);

    //Input Validations
    if($username == '') {
        $errmsg_arr[] = 'Username missing';
        $errflag = true;
    }
    if($password == '') {
        $errmsg_arr[] = 'Password missing';
        $errflag = true;
    }

    //If there are input validations, redirect back to the login form
    if($errflag) {
        $_SESSION['ERRMSG_ARR'] = $errmsg_arr;
        session_write_close();
        header("location: index.php");
        exit();
    }

    //Create query
    $qry="SELECT * FROM member WHERE username='$username' AND password='$password'";
    $result=mysqli_query($qry);

    //Check whether the query was successful or not
    if($result) {
        if(mysqli_num_rows($result) > 0) {
            //Login Successful
            session_regenerate_id();
            $member = mysqli_fetch_assoc($result);
            $_SESSION['SESS_MEMBER_ID'] = $member['mem_id'];
            $_SESSION['SESS_FIRST_NAME'] = $member['username'];
            $_SESSION['SESS_LAST_NAME'] = $member['password'];
            session_write_close();
            header("location: home.php");
            exit();
        }else {
            //Login failed
            $errmsg_arr[] = 'user name and password not found';
            $errflag = true;
            if($errflag) {
                $_SESSION['ERRMSG_ARR'] = $errmsg_arr;
                session_write_close();
                header("location: index.php");
                exit();
            }
        }
    }else {
        die("Query failed");
    }
?>

<?php
    //require_once('auth.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<style type="text/css">
<!--
.style1 {
    font-size: 36px;
    font-weight: bold;
}
-->
</style>
</head>

<body>
<p align="center" class="style1">Login successfully </p>
<p align="center">This page is the home, you can put some stuff here......</p>
<p align="center"><a href="index.php">logout</a></p>
</body>
</html>