Implementation of set theory operations in php

Question

How to implement set theory operations in pure php?

Answer 1

What kind of surgery are you looking for? What are you trying to accomplish?

In PHP, an array is (imperfectly) similar to a set, and PHP has array_intersect , array_merge (union) and array_diff (addition) built-in functions. array_uintersect and array_udiff to handle complex objects, comparison is not so simple.

Are additional features needed?

Answer 2

You have probably already seen these links:

http://jamietalbot.com/2010/02/04/set-operations-in-php/

http://oreilly.com/catalog/progphp/chapter/ch05.html