htaccess redirect url to directory file - php

Question

am working on making my site urls search engine friendly and for which am rewriting urls with GET parameters and so i have done rewriting but now htaccess is not pointing that url to php file which is suppose to handle the url
my old url
www.domain.com/foo/myfile.php?nid=554
new rewritten url with php
www.domain.com/foo/554-demo-page-title
my current htaccess rules which work for old urls but not for new
Options +FollowSymLinks
RewriteEngine On
#RewriteCond %{SCRIPT_FILENAME} !-d
#RewriteCond %{SCRIPT_FILENAME} !-f
RewriteBase /
RewriteRule ^([0-9]+)-(.*) ./foo/myfile.php?nid=$1 [NC]
so i want to that both old and new urls land on /foo/myfile.php becuase myfile.php can handle both urls incase of old url it rewrite and redirect as new url , i played for few hours with htaccess rules but no success

Answer 1

You can use this rule in site root .htaccess (assuming there is .htaccess inside foo/ directory):
Options +FollowSymLinks
RewriteEngine On
RewriteBase /
RewriteRule ^foo/(\d+)-.*$ foo/myfile.php [L,QSA,NC]
If you already have /foo/.htaccess then use this rule inside that file:
Options +FollowSymLinks
RewriteEngine On
RewriteBase /foo/
RewriteRule ^(\d+)-.*$ myfile.php [L,QSA]