function d($v) {
	echo '<pre>';
	var_dump($v);
	echo '</pre>';
	die();
}

session_start();

if(isset($_POS['submit'])) {
	if(empty($_POST['username']) || empty($_POST['password'])) {
		$error = "username or password invalid";
	}
	else
	{
		$username = $_POST['username'];
		$password = $_POST['password'];

		$db = new PDO('mysql:host=127.0.0.1;dbname=rush;charset=utf8', 'rush', 'Password....', array(PDO::ATTR_EMULATE_PREPARES => false, PDO::ATTR_ERRMODE =>PDO::ERRMODE_EXCEPTION));
		foreach($db->query('SELECT * FROM accounts WHERE password="$password" AND userName="$username"') as $rows){
			d($rows);
			if($rows == 1) {
				$_SESSION['login_user'] = $username;
				header("location: profile.php");
				} else {
					$error = "username invalid";
				}
			}
		}
	}