PHP | DsMap reverse() Function

PHP | Ds\Vector sort() Function

Last Updated : 22 Aug, 2019

The Ds\Vector::sort() function is an inbuilt function in PHP which is used to sort the elements of vector in-place. This will arrange the vector elements in increasing order. Syntax:

void public Ds\Vector::sort( $comparator )

Parameters: This function accepts a single parameter $comparator which is used to hold the sort function. Return Value: This function does not returns any value. Below programs illustrate the Ds\Vector::sort() function in PHP: Program 1:

PHP

<?php

// Declare new Vector
$vect = new \Ds\Vector([6, 5, 4, 3, 2, 1]);

echo("Original vector\n");

// Display the vector elements
print_r($vect);

// Use sort() function to sort
// the vector elements
$vect->sort();

echo("\nSorted elements\n");

// Display the sorted vector 
// elements
print_r($vect);

?>

Output:

Original vector
Ds\Vector Object
(
    [0] => 6
    [1] => 5
    [2] => 4
    [3] => 3
    [4] => 2
    [5] => 1
)

Sorted elements
Ds\Vector Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

Program 2:

PHP

<?php

// Declare new Vector
$vect = new \Ds\Vector([3, 6, 1, 2, 9, 7]);

echo("Original vector\n");

// Display the vector elements
print_r($vect);

// Use sort() function to sort
// the vector elements
$vect->sort(function($element1, $element2) {
    return $element2 <=> $element1;
});

echo("\nDecreasing Sorted elements\n");

// Display the sorted vector 
// elements
print_r($vect);

?>

Output:

Original vector
Ds\Vector Object
(
    [0] => 3
    [1] => 6
    [2] => 1
    [3] => 2
    [4] => 9
    [5] => 7
)

Decreasing Sorted elements
Ds\Vector Object
(
    [0] => 9
    [1] => 7
    [2] => 6
    [3] => 3
    [4] => 2
    [5] => 1
)

Reference: http://php.net/manual/en/ds-vector.sort.php

PHP | DsMap reverse() Function

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