title: PHP session variable changes between pages
body: <p>I have a session variable that I set like this:</p>
  
  <pre><code>&lt;?php
  $token = md5(uniqid(rand(), true));
  session_start();
  $_SESSION['token'] = $token;
  print $_SESSION['token'];
  ?&gt;
  </code></pre>
  
  <p>Then on another page I have this:</p>
  
  <pre><code>&lt;?php
  session_start();
  print $_SESSION['token'];
  ?&gt;
  </code></pre>
  
  <p>The problem is that they don't match. I get two completely different strings. <code>register_globals</code> is off. I did notice that when I set <code>md5(....)</code> to a constant string eg: <code>md5('example')</code> that it works as expected and the two strings match. But that shouldn't matter. Any ideas on what's going on here?</p>
  
  <p>EDIT: Apache Acces Log:</p>
  
  <pre><code>127.0.0.1 - - [18/Sep/2010:17:46:09 -0500] "GET /index.php HTTP/1.1" 200 3182 "-" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.59 Safari/534.3"
  127.0.0.1 - - [18/Sep/2010:17:46:09 -0500] "GET /style/style.css HTTP/1.1" 304 - "http://cmb.local:8888/index.php" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.59 Safari/534.3"
  127.0.0.1 - - [18/Sep/2010:17:46:09 -0500] "GET /js/signup.js HTTP/1.1" 304 - "http://cmb.local:8888/index.php" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.59 Safari/534.3"
  127.0.0.1 - - [18/Sep/2010:17:46:09 -0500] "GET /index.php HTTP/1.1" 200 3182 "http://cmb.local:8888/index.php" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.59 Safari/534.3"
  127.0.0.1 - - [18/Sep/2010:17:46:10 -0500] "GET /index.php HTTP/1.1" 200 3182 "http://cmb.local:8888/index.php" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.59 Safari/534.3"
  </code></pre>
  
  <p>I'm not quite sure how to read that but it looks to me that my file (index.php which I assume is the '/') is being called three times. Am I reading that right? What's going on there?</p>