کد:
# Skip this entire section if no uppercase letters in requested URL 
RewriteRule ![A-Z] - [S=28] 
# Else rewrite one of each uppercase letter to lowercase 
RewriteRule ^([^A]*)A(.*)$ /$1a$2 
RewriteRule ^([^B]*)B(.*)$ /$1b$2 
RewriteRule ^([^C]*)C(.*)$ /$1c$2 
... 
RewriteRule ^([^Z]*)Z(.*)$ /$1z$2 
# If more uppercase letters remain, re-invoke .htaccess and start over 
RewriteRule [A-Z] - [N] 
# Else do a 301 redirect to the all-lowercase URL 
RewriteRule (.*) http://www.example.com/$1 [R=301,L]