Redirect all pages to login

// Redirects all pages except login, register, and profile url to the login page.
// (note: the profile url is needed for password reset which is why it is excluded).

/** 
 * Use 'template_redirect' if you might need to use additional functions for
 * logical tests that need $post data, like is_page()
 * @see: https://codex.wordpress.org/Plugin_API/Action_Reference/template_redirect
 */
add_action( 'template_redirect', 'my_redirect_to_login' );
function my_redirect_to_login() {
  // Get an array of user pages with wpmem_user_pages()
  // @see: https://rocketgeek.com/plugins/wp-members/docs/api-functions/wpmem_user_pages/
  $pages = wpmem_user_pages();

  // If the user is not logged in, and the current page is not in the user pages array.
  // @see: https://rocketgeek.com/plugins/wp-members/docs/api-functions/wpmem_current_url/
  if ( ! is_user_logged_in() && ! in_array( wpmem_current_url( true, false ), $pages ) ) {
    // Redirect the user to the login page.
      wpmem_redirect_to_login();
  }
  return;
}