PHP Ds\Queue copy() Function

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

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

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

php

<?php 

// Declare new Queue  
$q = new \Ds\Queue(); 

// Add elements to the Queue 
$q->push("One");
$q->push("Two");
$q->push("Three");

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

?> 

Output:

Ds\Queue Object
(
    [0] => One
    [1] => Two
    [2] => Three
)

Program 2:

php

<?php 

// Declare new Queue  
$q = new \Ds\Queue(); 

// Add elements to the Queue 
$q->push("Geeks");
$q->push("for");
$q->push("Geeks");

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

?> 

Output:

Ds\Queue Object
(
    [0] => Geeks
    [1] => for
    [2] => Geeks
)

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

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