PHP | Ds\Set sorted() Function

The Ds\Set::sorted() function is an inbuilt function in PHP which is used to return a sorted copy of given set. Syntax:

Ds\Set public Ds\Set::sorted ([ callable $comparator ])

Parameters: This function accepts a comparator function according to which the values will be compared while sorting the Set. The comparator should return the following values based on the comparison of two values passed to it as a parameter:

• 1: if the first element is expected to be less than the second element.
• -1: if the first element is expected to be greater than the second element.
• 0: if the first element is expected to be equal to the second element.

Return value: It returns the sorted copy of the given set. Below programs illustrate the Ds\Set::sorted() function in PHP: Program 1: 

<?php 
// PHP program to illustrate sorted() function 

$set = new \Ds\Set([20, 10, 30]); 

// sort the Set 
print_r($set->sorted()); 

?> 

Ds\Set Object
(
    [0] => 10
    [1] => 20
    [2] => 30
)

Program 2: 

<?php 

// Declare a new set
$set = new \Ds\Set([2, 3, 6, 5, 7, 1, 4]); 

$sorted = $set->sorted(function($a, $b) {
    return $b <=> $a;
});

print_r($sorted);

?>

Ds\Set Object
(
    [0] => 7
    [1] => 6
    [2] => 5
    [3] => 4
    [4] => 3
    [5] => 2
    [6] => 1
)

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