Register and login with php & mysqli using oop

login.php

<?php 
  // filename: include/login.php
	session_start(); 
	include 'class.user.php';
	if (isset($_REQUEST['login'])) {
	$user = new User();
	extract($_REQUEST);
	$login = $user->check_login($emailusername, $password);
	if ($login) {
	// Registration Success
	header("location: ../home.php");
	// echo '<script>window.location = "../home.php"</script>';
	exit();
	} else {
	// Registration Failed
	// echo 'Wrong username or password';
		$_SESSION['msg'] = '<div class="alert alert-danger alert-dismissable">
	<a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
	<strong>Unable to login</strong>! Wrong username/email or password.
	</div>';
		header("location: ../login.php");
		exit();
	}
	}
?>