WP: login page customization

Login page customization

/* ================ LOGIN PAGE CUSTOMIZATION
*/

// 1. Add stylesheet
function sam_custom_login_styles(){
?><link rel="stylesheet" href="<?php echo get_stylesheet_directory_uri(); ?>/css/forms.css" type="text/css" />
<link rel="stylesheet" href="<?php echo get_stylesheet_directory_uri(); ?>/css/login.css" type="text/css" />
<?php
}
add_action('login_head', 'sam_custom_login_styles');

// 2. Change logo link url and title (change logo image in login.css)
function sam_login_header_url(){
    return "/";
}
add_action('login_headerurl', 'sam_login_header_url');
function sam_login_header_link_title(){
    return "Back to home page";
}
add_action('login_headertitle', 'sam_login_header_link_title');

// 3. Add a login message
function sam_login_message($msg){
    return $msg . "<p class=\"login-welcome\">Welcome. Please login first.</p>";
}
add_action('login_message', 'sam_login_message');

// 4. Redirect non admin users to home page after login (they can still access admin later)
function sam_login_redirect( $redirect_to, $request, $user  ) {
  return ( is_array( $user->roles ) && in_array( 'administrator', $user->roles ) ) ? admin_url() : site_url();
}
add_filter( 'login_redirect', 'sam_login_redirect', 10, 3 );