title: Pass Variable into Wordpress
body: <p>Can someone tell me how to pass a variable into Wordpress from an incoming URL?  For example, I have a visitor following this link:</p>
  
  <ul>
  <li><a href="http://mywebsite.com?variable=white" rel="nofollow">http://mywebsite.com?variable=white</a></li>
  </ul>
  
  <p>When they arrive at my wordpress site, I want to pull that "white" variable and store it for future use in my MailChimp list and departing links like this:</p>
  
  <ul>
  <li>store mailchimp color</li>
  <li><a href="http://mySecondWebsite.com?favoriteColor=white" rel="nofollow">http://mySecondWebsite.com?favoriteColor=white</a></li>
  </ul>
  
  <p>I want this to be temporary and specific to this user only.  I understand the concept and use of session_start(), but I have no idea how to use this in conjunction with Wordpress.  Any help is appreciated. </p>