PHP Ds\Map copy() Function

The Ds\Map::copy() function of PHP is used to get a shallow copy of the specified Map instance. It returns a copy of the Map instance containing all of the key-value pairs in the same order as that of the specified Map instance.

Syntax:

Ds\Map public Ds\Map::copy ( )

Parameter: This function does not accepts any parameter.

Return value: It returns a shallow copy of the specified Map instance.

Below programs illustrate the Ds\Map::copy() function:

Program 1:

<?php
// PHP program to illustrate copy() function

$map = new \Ds\Map([1 => "Geeks", 2 => "for",
                                3 => "Geeks"]);

print_r($map->copy());

?>

Output:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => 1
            [value] => Geeks
        )

    [1] => Ds\Pair Object
        (
            [key] => 2
            [value] => for
        )

    [2] => Ds\Pair Object
        (
            [key] => 3
            [value] => Geeks
        )

)

Program 2:

<?php
// PHP program to illustrate copy() function

$map = new \Ds\Map(["first" => "Geeks", "second" => "for",
                                "third" => "Geeks"]);

print_r($map->copy());

?>

Output:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => first
            [value] => Geeks
        )

    [1] => Ds\Pair Object
        (
            [key] => second
            [value] => for
        )

    [2] => Ds\Pair Object
        (
            [key] => third
            [value] => Geeks
        )

)

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

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