Magnific弹出窗口不会在页面重定向上关闭

Question

I have a iframe-based Magnific popup and its content is a form called from another page.

When I submit and redirect in PHP it only reloads the page on Magnific popup, it does not close the popup and does not redirect the main page.

<a href="popup.html" class="popup-youtube"></a>

$('.popup-youtube').magnificPopup({
  type: 'iframe'
});

$.extend(true, $.magnificPopup.defaults, {  
  iframe: {
    patterns: {
      youtube: {
        index: 'youtube.com/', 
        id: 'v=', 
        src: 'https://www.youtube.com/embed/%id%?autoplay=1' 
      }
    }
  }
});