Encoding url in php to prevent direct access
<p>There are three steps for user registration on my site and right now the urls for that are similar to:</p>

<pre><code>http://www.example.com/register.php

http://www.example.com/registerstep2.php

http://www.example.com/registerstep3.php  
</code></pre>

<p>I was wondering what is an easy way to encode it to something like:</p>

<pre><code>http://www.example.com/w^3434SD343f232gihmsdsdwre232
</code></pre>

<p>The reason I am trying to do this, is I am trying to ensure that users follow steps and don't try to 'trick' the system by directly going to a registration link 3 for example.</p>
