(PECL ds >= 1.0.0)
Ds\Set::diff — Creates a new set using values that aren't in another set
Creates a new set using values that aren't in another set.
A \ B = {x ∈ A | x ∉ B}
set
Set containing the values to exclude.
A new set containing all values that were not in the other set
.
Example #1 Ds\Set::diff() example
<?php
$a = new \Ds\Set([1, 2, 3]);
$b = new \Ds\Set([3, 4, 5]);
var_dump($a->diff($b));
?>
The above example will output something similar to:
object(Ds\Set)#3 (2) { [0]=> int(1) [1]=> int(2) }