c

<?php
include("../includes/config.php");
session_start();

if(isset($_POST['go'])){

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

	if(empty($username) || empty($password)){
		echo "<center><b>Please Enter Both Fields!</b></center>";
		die();
	}


		$login_info = "SELECT * from users WHERE username = '$username'";
		$run_login_info = mysql_query($login_info);
		$numrow = mysql_num_rows($run_login_info);

		if ($numrow !== 0) {



					while ($row = mysql_fetch_assoc($run_login_info)) {
						$dbusername = $row['username'];
						$dbpassword = $row['password'];
					}

					// check username and password
							if ($username==$dbusername && $password == $dbpassword) {
								$_SESSION['username'] == $username;
								$_SESSION['password'] == $password;

							}
							else{
								die("<b><center>Incorrect Username Or Password!</center></b>");
							}


		}
		else{
			die("<center><b>Invalid Username Or Password!</b></center>");
		}


}
?>