posting to Facebook page wall as page itself with no user session
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This is my first question here, so apologies if asking something trivial - though I didn't find an answer after an hour of digging.

I have a PHP website which needs to connect with a Facebook page in the following method:
On certain triggers, the site needs to post to the page's wall _as the page itself_. This has to be done automatically, even if no user session is available (e.g. if someone uses the site without actually having a Facebook account).

I found solutions using extended token expiration times (offline access), but in those cases, the post will always appear as the site admin (me, in this case). However, I need the post to be written by the page. When using Facebook as the page, I have no right to request an offline access token.

Is this even possible at the moment?