<p>I want to force Apache to use HTTPS for a particular URL in the following form:</p>

<pre><code>https://www.example.com/signup/*
</code></pre>

<p>so</p>

<p>if someone goes to any of the following example URLs directly, Apache will forward the URL over to the HTTPS equivalent site.</p>

<p>e.g.</p>

<pre><code>http://www.example.com/signup  --&gt;  https://www.example.com/signup
http://www.example.com/signup/basic+plan  --&gt;  https://www.example.com/signup/basic+plan
http://www.example.com/signup/premium  --&gt;  https://www.example.com/signup/premium 
</code></pre>

<p>Anyone know how?</p>

<p>Thanks in advance</p>

You should take a look at
mod_rewrite
documentation