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