PHP | Ds\Set diff() Function

The Ds\Set::diff() function is an inbuilt function in PHP which is used to create a set which contains the elements of the first set which are not present in the second set.

Syntax:

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

Parameters: It is used to hold the set, which value need to exclude.

Return Value: It returns a new set containing the elements of the first set which are not present in the second set.

Below programs illustrate the Ds\Set::diff() function in PHP:

Program 1:

<?php

// Declare a new set
$a = new \Ds\Set([2, 3, 6]);

// Declare another new set
$b = new \Ds\Set([2, 4, 6, 7]);

// Print the diff of set
echo("Difference of set1 and set2: \n");

print_r($a->diff($b));

?>

Output:

Difference of set1 and set2: 
Ds\Set Object
(
    [0] => 3
)

Program 2:

<?php

// Declare a new set
$a = new \Ds\Set([2, 3, 6, 7, 8]);

// Declare another new set
$b = new \Ds\Set([2, 3, 5, 8, 9, 10]);

// Print the diff of set
echo("Difference of set1 and set2: \n");

var_dump($a->diff($b));

?>

Output:

Difference of set1 and set2: 
object(Ds\Set)#3 (2) {
  [0]=>
  int(6)
  [1]=>
  int(7)
}

Reference: https://www.php.net/manual/en/ds-set.diff.php