You can't update from c5.6 to c5.7 or c5v8. Moving from c5.6 to c5.7+ is essentially a redevelopment with a content export/import to get a some of the drudge-work done.

Some solutions:

1. Your host may provide a way to configure your sites for php5.6.

2. Develop new sites in latest c5v8. Ultimately the nicest solution. But also the most expensive.

3. With concrete5.6, there is an (unreleased) c5.6.4 on GitHub that is compatible with php7. However, that is just the core and you may need to modify addons for php7 compatibility. For example, eCommerce - seehttps://www.concrete5.org/marketplace/addons/zone-based-shipping/eco... .

Lots of us have 5.6 sites running php7 through this. However, don't attempt to do that upgrade unless you are a developer. Its not a click-and-go upgrade like you are used to, so you would need to hire a developer who had done this before.

4. Move your sites to another host that supports php5.6

Ok thanks a lot for the quick reply. That makes sense.