Protect a specific page with PMPro

protect_specific_page.php

/*
  Protect a specific page with PMPro
  
  Edit the code below to check your specific page slug and membership level ID.
  
  Add this code to your active theme's functions.php or a custom plugin.
*/
function protect_specific_page()
{
  //make sure PMPro is active
  if(!function_exists('pmpro_hasMembershipLevel'))
    return;
    
  if(is_page('my-page-slug']) && !pmpro_hasMembershipLevel()) //can add level id or array as parameter to check for specific level(s)
  {
    wp_redirect(pmpro_url('levels'));
    exit;
  }
}
add_action('template_redirect', 'protect_specific_page');