This topic has been raised many times, and we always repeated that it is not a real good thing SEOwise to have such long urls.
With the ultimate seo url mod, it would be a bit easier to do, but still, to work in all cases it would involves more SQL and more (many) code changes.
A way to do it in a light way would be to directly add the parent urls in the phpbb_seo/cache/phpbb_cashe.php file, for each forum, and to replace the :
- Code: Select all
[a-z0-9_-]
with
- Code: Select all
[a-z0-9_/-]
for all forum rewriterules.
Worth testing if you really want this.
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