<?php
ob_start();
$host="localhost"; // Host name
$username="root"; // Mysql username
$password="root"; // Mysql password
$db_name="users"; // Database name
$tbl_name="access"; // Table name

// Connect to server and select databse.
mysql_connect("localhost","root","") or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

$username=$_POST['username'];
$password=$_POST['password'];

// To protect MySQL injection (more detail about MySQL injection)
$username = stripslashes($username);
$password = stripslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);

$sql="SELECT * FROM $tbl_name WHERE username= '$username' and password='$password'";

$result=mysql_query($sql);
$count=mysql_num_rows($result);

if($count==1){
// Register $myusername, $mypassword and redirect to file "home.php"
session_register("username");
session_register("password");
header("location:home.php");
}
else {
echo "Wrong Username or Password";
}

ob_end_flush();
?>