I learned PHP first (PHP v3, dark days!) when there weren't really any frameworks in existence - so my experience is a bit coloured by that. I think if I were starting now I'd probably start with a framework like Laravel and pick up 'pure' PHP as I went along. Kind of like (and this will date me - again) learning to use Delphi rather than 'pure' pascal.
There are some good lessons on here for 'pure' PHP - like the katas for instance which might help though :-)