title: how to save a textarea contents of an html5 form to a text file at server side using php?
body: <p>how to save a textarea contents of an html5 form to a text file at server side?
  e.g.</p>
  
  <pre><code>&lt;form&gt;
       &lt;textarea name="content "&gt;
              contents...
        &lt;/textarea&gt;
        &lt;input type="submit" name="submit" /&gt;
  &lt;/form&gt;
  </code></pre>