Replace items with RewriteRule using .htaccess - .htaccess

Question

I'm trying to use the Url rewrite using "RewriteRule".
I would use this link to show a new article in my blog:
https://www.example.com/article/how-to-visit-italy-in-winter
The original script (including vars) is
https://www.example.com/post.php?idpost=how-to-visit-italy-in-winter
This is my .htaccess
RewriteEngine on
RewriteRule ^article/$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .$ https://www.example.com/post.php?idpost=$1 [L]
but it doesn't work, the browser redirect to:
https://www.example.com/post.php?idpost=
I'm trying to resolve about 2 days witout success :(
Thank you.

Answer 1

You rule looks fine except for two things . Your $1 back reference is undefined and empty as you are not capturing any URI. To capture parts of the uri you need to use Regex capture-groups (.*) .
2) You need to use an absolute path instead of the full url as your RewriteRule`s destination if you want to silently redirect the url.
RewriteEngine on
RewriteRule ^article/$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule article/(.+) /post.php?idpost=$1 [L]