Built in support for sets in PHP?

Question

I\'m looking for a simple way to create an array in php that will not allow duplicate entries, but allows for easy combining of other sets or arrays.

I\'m mostly int

Answer 1

The answer is no, there is not a native set solution inside PHP. There is a Set data structure, but that is not baseline PHP.

There is a convention for implementing sets using maps (i.e. associative arrays) in any language. And for PHP you should use true as the bottom value.

true, 5=>true, 7=>true];
$right = [6=>true, 7=>true, 8=>true, 9=>true];

$union = $left + $right;
$intersection = array_intersect_assoc($left, $right);

var_dump($left, $right, $union, $intersection);