title: Use input tag value from external html file for submitting
body: <p>I have got 2 html files:
  File1.html contains a form to submit to a PHP file:</p>
  
  <pre><code>&lt;form action="handle_form.php" method="get"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>File2.html contains some input tags:</p>
  
  <pre><code>&lt;input name="fullname" /&gt;
  &lt;input name="email" /&gt;
  ...
  </code></pre>
  
  <p>How can i load file2.html to file1.html to submit input value from file2.html to handle_form using PHP.Thank a lot!</p>