Is there a way of implementing tree ADT in php and mysql?

A good way to get all the nodes for a given tree when you use Adjacency List is to add a column to every row called root_id or something, so every node knows not only its immediate parent, but also the top node in its tree.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.