Set
PHP Manual

Ds\Set::intersect

Creates a new set by intersecting values with another set.

Description

public Ds\Set Ds\Set::intersect ( Ds\Set $set )

Creates a new set using values common to both the current instance and another set. In other words, returns a copy of the current instance with all values removed that are not in the other set.

A ∩ B = {x : x ∈ A ∧ x ∈ B}

Parameters

set

The other set.

Return Values

The intersection of the current instance and another set.

See Also

Examples

Example #1 Ds\Set::intersect example

<?php
$a = new \Ds\Set([1, 2, 3]);
$b = new \Ds\Set([3, 4, 5]);

var_dump($a->intersect($b));
?>

The above example will output something similar to:

object(Ds\Set)#3 (1) {
  [0]=>
  int(3)
}