How to add &ref=123 every link
<p>How would i be able to put the follow on the end of every link of my website with out editing every link?</p>

<p>e.g <code>www.WebsiteName.com/?ref=123</code></p>

<p>so if i went to  <code>www.WebsiteName.com/aboutus.php</code> i want it to add <code>?ref=123</code> onto the end of the url.</p>
