Extract data from php doc block (author field)

[erikyo]

When I was talking about it with @roborourke here I was wrong and even just with the php doc block, we could have some data missing like the author's email.

Check below:
https://docs.phpdoc.org/guide/references/phpdoc/tags/author.html

So we can still get a lot of metadata from the additional php headers that currently were missing in some cases.