PHP | Ds\Deque copy() Function

The Ds\Deque::copy() function is an inbuilt function in PHP which is used to return a copy of the Deque. This will return a shallow copy of the Deque. Syntax:

public Ds\Deque::copy ( void ) : Ds\Deque

Parameters: This function does not contain any parameter. Return Value: This function returns a copy of the Deque elements. Below programs illustrate the Ds\Deque::copy() function in PHP: Program 1: PHP

<?php

// Declare deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Elements in the Deque\n");

// Display the Deque elements
var_dump($deck);

// Use copy() function to 
// copy the Deque
$deck_copy = $deck->copy();

echo("\nCopy Deque elements\n");

// Display the Deque elements
var_dump($deck_copy);

?>

Program 2: PHP

<?php

// Declare deque
$deck = new \Ds\Deque(["geeks", "for", "geeks"]);

echo("Elements in the Deque\n");

// Display the Deque elements
print_r($deck);

// Use copy() function to 
// copy the Deque
$deck_copy = $deck->copy();

echo("\nCopy Deque elements\n");

// Display the Deque elements
print_r($deck_copy);

?>

Reference: https://www.php.net/manual/en/ds-deque.copy.php