_Note: While I filed this under 3.1.7-pl1, the same issue existed in 3.0.
So, running phpBB on HHVM results in wrong URL paths. For example, when trying to change profile info, instead of being redirected to , I get redirected to .
I have forced server settings in the ACP, but no luck.
Temporarily I have patched this with the following code:
Find and comment in session.php: