Change PHP GET with link?
<p>I'd like to create a link that changes a PHP <code>$_GET</code> variable. For example:</p>

<pre><code>URL: http://site.com/index&amp;variable=hello&amp;anothervariable=dontchangeme

&lt;a href="variable=world"&gt;Click me&lt;/a&gt;

(after click)

URL: http://site.com/index&amp;variable=world&amp;anothervariable=dontchangeme
</code></pre>

<p>I know you can do this to just change the page (<code>href="1.html"</code>), but I'd like to do the same thing while maintaining the GET variables that were already there.</p>
