WP Functions for Custom Login (redirect etc)

/** * Function for redirecting users on login based on user role */
function my_login_redirect( $url, $request, $user ){
    if( $user && is_object( $user ) && is_a( $user, 'WP_User' ) ) {
        if( $user->has_cap( 'administrator' ) ) {
            $url = home_url('/index.php');
            } else {
                $url = home_url('/index.php');
                }
                }
                return $url;}add_filter('login_redirect', 'my_login_redirect', 10, 3 );

/** * Function for redirecting users on logout */
function logout_page() {
    $login_page  = home_url( '/login.php' );
    wp_redirect( $login_page . "" );
    exit;
}
add_action('wp_logout','logout_page');

/** * Function for redirecting users on failed login */
function login_failed() {
    $login_page  = home_url( '/login.php' );
    wp_redirect( $login_page . "?login=failed" );
    exit;
}
add_action( 'wp_login_failed', 'login_failed' );

/** * Function for redirecting users on empty user & pass fields */
function verify_username_password( $user, $username, $password ) {
    $login_page  = home_url( '/login.php' );
    if( $username == "" || $password == "" ) {
        wp_redirect( $login_page . "?login=empty" );
        exit;
    }
}
add_filter( 'authenticate', 'verify_username_password', 1, 3);