remove id and index.php via htaccess in subdirectory - .htaccess

Question

current URL:
domain/index.php?id=p123
I want:
add www
remove:index.php
remove 'id' form URL
I do it this way:
RewriteCond %{THE_REQUEST} /(?:index\.php)?\?id=([^\s&]+) [NC]
RewriteRule ^ /%1? [R=302,L,NE]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php?id=$1 [L]
RewriteCond %{THE_REQUEST} /(?:index\.php)?\?id=([^\s&]+) [NC]
RewriteRule ^ /%1? [R=302,L,NE]
RewriteCond %{THE_REQUEST} ^GET.*index\.php [NC]
RewriteRule (.*?)index\.php/*(.*) /$1$2 [R=301,NE,L]
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
it works if domian is without sub directory.
how can I change this code to support sub directory too like this:
domian/subdirectory/index.php?id=p123

Answer 1

I'll go about it this way:
First, redirect non-www URLs to www ones:
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
Rewrite the friendly URLs to respective index.php files:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*/)?([^/]+)$ /$1index.php?id=$2 [L]
Next, handle the raw URIs with index.php in them:
RewriteCond %{THE_REQUEST} ^GET\ /(.*/)?(?:index\.php)?\?id=([^\s&]+) [NC]
RewriteRule ^ /%1%2? [R=301,L]
The last rule will also take care of URLs like domain.com/dir/?id=sth and domain.com/dir/index.php?id=sth

Answer 2

You can accomplish this with the following changes:
RewriteCond %{THE_REQUEST} \ /(.*/|)(?:index\.php)?\?id=([^\s&]+) [NC]
RewriteRule ^ /%1%2? [R=302,L,NE]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !index\.php
RewriteRule ^(.*/|)([^/]*)$ $1index.php?id=$2 [L]
We know that %{THE_REQUEST} has the format GET /path/to/index.php?id=12312412 HTTP/1.1 or something along those lines. In the first rule we match \, which is a literal space, then the beginning slash that is always there. (.*/|) will match everything until index.php, or exactly nothing. The same trick we do in the second rule. I have added RewriteCond %{REQUEST_URI} !index\.php to prevent an infinite loop when index.php does not exist for a particular directory.