<p>Given my new understanding of the power of &quot;includes&quot; with PHP, it is my guess that ALL of my pages on my site will be <code>.php</code> extension.</p>
<p>Would this be considered strange?</p>
<p>I used to think that most pages would be <code>.htm</code> or <code>.html</code>, but in looking around the net, I am noticing that there really isn't any &quot;standard&quot;.</p>
<p>I don't really think I have a choice, if I want to call my menus from a php file. It is just going to be that way, far as I can see... so just bouncing off you all to get a feel for what &quot;real programmers&quot; feel about such issues.</p>

It doesn't matter what your URLs end with,
```
.php
```
is fine, and fairly common.  The only thing people care about these days when it comes to URLs is making them pretty for Search Engine Optimisation, but that's a whole new question.