PHP Ds\PriorityQueue copy() Function

The Ds\PriorityQueue::copy() Function in PHP is used to create a shallow copy of a particular PriorityQueue instance. This function does not affect the existing PriorityQueue instance, it just creates a shallow copy of the PriorityQueue and returns it. Syntax:

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

Parameters: This function does not accepts any parameters. Return Value: This function creates a shallow copy of an existing PriorityQueue instance and returns it. Below programs illustrate the Ds\PriorityQueue::copy() Function in PHP: Program 1: php

<?php 

// Declare new PriorityQueue 
$pq = new \Ds\PriorityQueue(); 

// Add elements to the PriorityQueue
$pq->push("One", 1);
$pq->push("Two", 2);
$pq->push("Three", 3);

// Create copy of this PriorityQueue
// instance and print it
print_r($pq->copy());

?> 

Program 2: php

<?php 

// Declare new PriorityQueue 
$pq = new \Ds\PriorityQueue(); 

// Add elements to the PriorityQueue
$pq->push("Geeks", 1);
$pq->push("for", 2);
$pq->push("Geeks", 3);

// Create copy of this PriorityQueue
// instance and print it
print_r($pq->copy());

?> 

Reference: http://php.net/manual/en/ds-priorityqueue.copy.php