Remove %2F from URLs with mod_rewrite - .htaccess

Question

I would like to remove the '%252F' from my dynamically created URLs.
I have a php-file that creates links with a %2F instead of /.
The links are then represented in the URL-Bar as %252F instead of / which leads to some problems.
What I'm trying to achieve with a .htaccess-file is to redirect all %2F to / or rename all %252F to / since I can't change the php-code creating the links.
This is my .htaccess
RewriteEngine on
Options +SymlinksIfOwnerMatch
RewriteBase /
RewriteCond %{HTTP_HOST} subdomain.mydomain.com
RewriteCond %{REQUEST_URI} (.*)/style.css [OR]
RewriteCond %{REQUEST_URI} (.*)/script.js [OR]
RewriteCond %{REQUEST_URI} (.*)/logo.png
RewriteRule (.*) http://www.mydomain.com%{REQUEST_URI} [R=301,NC,L]
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^/]+/)*index\.php\ HTTP/
RewriteRule ^(([^/]+/)*)index\.php$ http://subdomain.mydomain.com/$1 [R=301,L]
RewriteCond %{THE_REQUEST} \ /([^\ \?]*)([^\ \?]*)%2f(\?.*)?\ [NC]
RewriteRule !^/ /%1/%2 [QSA]
RewriteRule ^(/.+)%2f(.*)$ $1/$2 [NC,QSA]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+index\.php\?dir=([^\s]+) [NC]
RewriteRule ^ %1? [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php?dir=/$1 [L]
I can't get it to work, maybe someone else can help me with this.
Thank you very much!

Answer 1

The lines:
RewriteCond %{THE_REQUEST} \ /([^\ \?]*)([^\ \?]*)%2f(\?.*)?\ [NC]
RewriteRule !^/ /%1/%2 [QSA]
RewriteRule ^(/.+)%2f(.*)$ $1/$2 [NC,QSA]
Need to have the leading slash removed. URI's sent through rules in htaccess files have the leading slash stripped off:
RewriteCond %{THE_REQUEST} \ /([^\ \?]*)([^\ \?]*)%2f(\?.*)?\ [NC]
RewriteRule ^ /%1/%2 [QSA]
RewriteRule ^(.+)%2f(.*)$ $1/$2 [NC,QSA,L]
Not sure what the RewriteRule !^/ /%1/%2 [QSA] line is supposed to do, it looks like you're stripping out a trailing slash?

Answer 2

I managed to get rid of the first %252F in the URL and the problem of "stacking" slashes:
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^/]+/)*index\.php\ HTTP/
RewriteRule ^(([^/]+/)*)index\.php$ http://subdomain.mydomain.com/$1 [R=301,L]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+index\.php\?dir=%2F([^\s]+) [NC,OR]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+index\.php\?dir=([^\s]+) [NC]
RewriteRule ^ %1? [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php?dir=/$1 [L]
I still have the problem of having %252F in my URLs though.