How can I rewrite index.php to xxx.php?

Question

I want the following two routes to be set in this way:

• Route 1: /post/123 -> app.php
• Route 2: /?p=123 -> app.php?p=123

Currently what I have in .htaccess is

RewriteRule ^$ app\.php [L]
RewriteRule post/(.*)$ app\.php [L]

How can I achieve route 2?

Answer 1

Try this in one rule:

RewriteEngine On

RewriteRule ^(post/.+)?$ app.php [L,NC]