as far as
1. To the degree or amount that; according to what, how much, or how far.
John did a good job as far as he went, but he did not finish it.
So far as the weather is concerned, I do not think it matters.
As far as he was concerned, things were going well.
2. To the extent that; within the limit that.
He has no brothers so far as I know.
Compare: FOR ALL (2).