title: Linux Apache PHP: ERR_EMPTY_RESPONSE
body: <p>Apache and PHP are installed right now.
  I test my php code which is right on windows.</p>
  <blockquote>
  <p>Chrome report page can not load:ERR_EMPTY_RESPONSE.</p>
  </blockquote>
  <p>It seems <code>$_POST</code> do not work.</p>
  <p>note.php</p>
  <pre><code>&lt;?php
    session_start();
    _SESSION['note']='&lt;p&gt;'.$_POST['text'].'&lt;/p&gt;'.$_SESSION['note'];
  ?&gt;
  &lt;html&gt;
    &lt;body&gt;
      &lt;title&gt;Note&lt;/title&gt;
      &lt;form method=&quot;post&quot; action=&quot;note.php&quot; name=form1&gt;
        &lt;input type=&quot;text&quot; name=&quot;text&quot; size=100 required&gt;
        &lt;input type=&quot;submit&quot; value=&quot;submit&quot; name=&quot;B1&quot;&gt;
        &lt;input type=&quot;reset&quot; value=&quot;reset&quot; name=&quot;B2&quot;&gt;
      &lt;/form&gt;
      &lt;?php
        echo $_SESSION['note'];
      ?&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  <p>Change the form to GET method, it works well.</p>
  <pre><code>&lt;?php
    session_start();
    $_SESSION['note']='&lt;p&gt;'.$_GET['text'].'&lt;/p&gt;'.$_SESSION['note'];
  ?&gt;
  &lt;html&gt;
    &lt;head&gt;
      &lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=utf-8&quot;&gt;
    &lt;/head&gt;
    &lt;body&gt;
      &lt;title&gt;Note&lt;/title&gt;
      &lt;form method=&quot;get&quot; action=&quot;note.php&quot; name=form1&gt;
        &lt;input type=&quot;text&quot; name=&quot;text&quot; size=100&gt;
        &lt;input type=&quot;submit&quot; value=&quot;submit&quot; name=&quot;B1&quot;&gt;
        &lt;input type=&quot;reset&quot; value=&quot;reset&quot; name=&quot;B2&quot;&gt;
      &lt;/form&gt;
      &lt;?php
        echo $_SESSION['note'];
      ?&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>