title: How read external iframe via PHP or JavaScript
body: <p>I want to track my package sent via the local post service: <a href="http://tandt.posta.sk/en" rel="nofollow">http://tandt.posta.sk/en</a>.</p>
  
  <p>With the tracking information, for example, RF166699170SK, I can locate the package.</p>
  
  <p>but when I want to read it via PHP for example  curl_setopt, via file_get_contents, or another method, I read only HTML code but in output missing text for example "Item posted at post office Dlhé Pole" which I can see on page.</p>
  
  <p>because this page use iframe with some private method 
  <a href="http://www.posta.sk/en/sps-embed#tnt?q=RF166699170SK" rel="nofollow">http://www.posta.sk/en/sps-embed#tnt?q=RF166699170SK</a></p>
  
  <p>but when I try to read this page (iframe), output missing information about package for example "Item posted at post office Dlhé Pole".</p>
  
  <p><strong>Output:</strong></p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html class="embed"&gt;
    &lt;head&gt;
      &lt;link href="/sps/style.css?1450227250" media="screen,print" rel="stylesheet" type="text/css" /&gt;
      &lt;link href="/sps/print.css?1445466449" media="print" rel="stylesheet" type="text/css" /&gt;
      &lt;title&gt;Slovenská pošta&lt;/title&gt;
      &lt;meta charset="utf-8"&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"&gt;
      &lt;meta name="format-detection" content="telephone=no"&gt;
      &lt;meta name="google" value="notranslate"&gt;
      &lt;script type="text/javascript"&gt;CONFIG={"api":"http://api.posta.sk/private","tntShare":{"en":"http://tandt.posta.sk/en/items/{number}","sk":"http://tandt.posta.sk/zasielky/{number}"},"lang":"sk","home":"http://www.posta.sk","embed":true}&lt;/script&gt;
      &lt;script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=true"&gt;&lt;/script&gt;
      &lt;script src="/sps/script.js?1457665771" type="text/javascript"&gt;&lt;/script&gt;
        &lt;/head&gt;
    &lt;body&gt;
      &lt;script type="text/javascript"&gt;
  //&lt;![CDATA[
        var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
        document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
  //]]&gt;
  &lt;/script&gt;&lt;script type="text/javascript"&gt;
  //&lt;![CDATA[
        try {
          var pageTracker = _gat._getTracker("UA-9600731-1");
          pageTracker._setDomainName("posta.sk");
          pageTracker._initData();
          pageTracker._trackPageview();
        } catch(err) {}
  //]]&gt;
  &lt;/script&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Is it possible to read about this parcel via PHP or JavaScript?</p>