SEO Friendly Blog URL's

That works but now I have a new problem. I had a sitemap set up for my blog that requires php. After changing the .htacess the sitemap no longer displays properly.

/blog/blog-sitemap.php

<?php
    header('Content-type: application/xml');
    include('../perch/runtime.php');
    perch_blog_custom(array(
        'template'=>'blog-sitemap.html',
        'count' => 6000
    ));
?>

blog-sitemap.html

<perch:before><?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="https://www.sitemaps.org/schemas/sitemap/0.9">
</perch:before>
<url>
    <loc>https://example.com<perch:blog id="postURL"/></loc>
</url>
<perch:after>
</urlset>
</perch:after>

Is there a rewrite that will make sure that https://example.com/blog/blog-sitemap has the .php?

Before the rewrite it would appear as a standard xml tree. After the rewrite it displays what the default post.php would display when there isn't a specific post to display.

No. Thats why I thought there was possibly a way to make sure that /blog/blog-sitemap rewrites to /blog/blog-sitemap.php and actual blog posts like /blog/example-blog-post.php rewrite to /blog/example-blog-post

I have no idea what the actual rewrite rules would be though.

The rewrite rule that is effecting the sitemap is:

RewriteRule ^blog/([a-zA-Z0-9-/]+)$ /blog/post.php?s=$1 [L]

That worked. You're the man, Drew!