Restrict site to logged in user

gistfile1.txt

<?php
/*
* Plugin Name: Restrict a  site
*/
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

// Hook 'redirect_if_not_logged_in' function into 'template_redirect' action

add_action('template_redirect', '1sw2_redirect_if_not_logged_in');

function 1sw2_redirect_if_not_logged_in() {
 // Check if user isn't logged in
    if ( ! is_user_logged_in() ) {
    // If not logged in, redirect to login form
        auth_redirect();
    }
}

// hook on login  

add_action('wp_login', '1sw2_redirect_subscriber_on_login', 10, 2);

function 1sw2_redirect_subscriber_on_login($user_login, $user) {
    // make subscriber go to home page
    if (in_array('subscriber', (array) $user->roles)) {
        // Redirect to homepage
        wp_redirect(home_url()); 
        exit();
    }
}