PHP | Ds\Vector rotate() Function

The Ds\Vector::rotate() function is an inbuilt function in PHP which is used to rotate the array elements by a given number of rotation. Rotations also happen in-place.

Syntax:

void public Ds\Vector::rotate( $rotations )

Parameters: This function accepts single parameter $rotations which holds the number of rotations.

Return Value: This function does not return any value.

Below programs illustrate the Ds\Vector::rotate() function in PHP:

Program 1:

<?php

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

echo("Original Vector\n");

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

// Use rotate() function to rotate
// the vector elements
$vect->rotate(3);

echo("\nVector after rotating by 3 places\n");

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

?>

Output:

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

Vector after rotating by 3 places
Ds\Vector Object
(
    [0] => 4
    [1] => 5
    [2] => 1
    [3] => 2
    [4] => 3
)

Program 2: When number of rotations are greater than the number of elements in the vector.

<?php

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

echo("Original Vector\n");

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

// Use rotate() function to rotate
// the vector elements
$vect->rotate(6);

echo("\nVector after rotating by 6 places\n");

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

?>

Output:

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

Vector after rotating by 6 places
Ds\Vector Object
(
    [0] => 2
    [1] => 3
    [2] => 4
    [3] => 5
    [4] => 1
)

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