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
