title: REGEX for removing PHP Parameter in URL from Google Analytics
body: <p>I need to create a regular expression for removing a url php parameter in a google analytics filter but I am not equipped with the right skills!</p>
  
  <p>We have a site that appends the following string to urls</p>
  
  <p>?currency=USD etc</p>
  
  <p>Just need to regex for this if anybody is able to help</p>
  
  <p>Thanks!</p>