title: PHPSESSID Cookie gets send multiple times
body: <p>In my current application the PHPSESSID Cookie gets send multiple times. Here's a sample response:</p>
  
  <pre><code>HTTP/1.1 200 OK
  Date: Tue, 11 Jun 2013 08:18:29 GMT
  Server: Apache/2.2.17 (Ubuntu)
  X-Powered-By: PHP/5.3.15-1~dotdeb.0
  Set-Cookie: ZDEDebuggerPresent=php,phtml,php3; path=/ PHPSESSID=625qvi6328pdq2t7psh4t3voi6; path=/ PHPSESSID=625qvi6328pdq2t7psh4t3voi6; path=/ PHPSESSID=625qvi6328pdq2t7psh4t3voi6; path=/
  Cache-Control: no-cache
  x-debug-token: 9dcc688323f1dad273d4c8fc7117f405a52ce998
  Vary: Accept-Encoding
  Content-Encoding: gzip
  Keep-Alive: timeout=15, max=100
  Connection: Keep-Alive
  Transfer-Encoding: chunked
  Content-Type: text/html; charset=ISO-8859-1
  </code></pre>
  
  <p>As you can see, there are three PHPSESSIDs.</p>
  
  <p>I tried to reproduce this behavior with a single file with three <code>session_start();</code> calls:</p>
  
  <pre><code>&lt;?php
  
  session_start();
  session_start();
  session_start();
  </code></pre>
  
  <p>but the cookie was send only once.</p>
  
  <p>Any idea how this could happen?</p>