Is it possible to read books on PHP 5.6 or she is no longer relevant?

Interested in the opinions of other visitors of the site!
Is it possible to read today's literature on 5.6 , if there is PHP 7
So if drastic changes?
June 27th 19 at 15:30
4 answers
June 27th 19 at 15:32
> Read about 5.6 to 7 not so much quality literature
> Read what's new in 7.*
June 27th 19 at 15:34
7 PHP = PHP 5.6 + new features

You can, of course.. and due to the fact. 5.6 what will be a long time to use, it's even a plus.
June 27th 19 at 15:36
You can even need to
June 27th 19 at 15:38
Read, but focus on php 7.

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