Untitled

<?php
$localhost = "localhost";
$username = "root";
$password = "";
$db = "login";

$conn = mysql_connect($localhost, $username, $password);

if(! $conn )
{
  die('Could not connect: ' . mysql_error());
}

if($conn )
{
  echo "Uspjesno spajanje na bazu! <br /><br />";
}
mysql_select_db($db);

session_start();
if(isset($_POST['submit']))
{

	if(!empty($_POST['user']) && !empty($_POST['pass']))
	{

		$user=$_POST ['user'];
		$pass=$_POST ['pass'];
		$select="select * from users where username='$user' && password='$pass'";
		$sql=mysql_query($select) or die(mysql_error());

		if(mysql_num_rows($sql)==1 )
		{
			echo "Login";
			$_SESSION['user'] = $user;
			header('location: welcome.php');
		}
		else {
			echo "Can't Login";
		}
	}
}
if (isset($_GET['logout'])){

	session_unregister('username');
}

?>


<html>
<head>

</head>

<body>

<form method="post" action="login.php">
Username: <input type="text" name="user" id="user" /> <br /> <br />
Password: <input type="password" name="pass" id="pass" /> <br /> <br />
<input type="submit" name="submit" value="Log In" />

</body>


</html>