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

// 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

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