PHP | Ds\Pair copy() Function

The Ds\Pair::copy() function is an inbuilt function in PHP which is used to return a copy of Pair elements. Syntax:

 Ds\Pair::copy( void )

Parameters: This function does not accept any parameters. Return Value: This function returns a shallow copy of the pair element. Below programs illustrate the Ds\Pair::copy() function in PHP: Program 1:

php

<?php

// Create new Pair
$pair = new \Ds\Pair("G", "GeeksforGeeks");

// Display the pair element
print_r($pair);

// Use copy() function
$pair->copy();

echo "Copied pair elements:\n";

// Display the pair element
print_r($pair);

?>

Output:

Ds\Pair Object
(
    [key] => G
    [value] => GeeksforGeeks
)
Copied pair elements:
Ds\Pair Object
(
    [key] => G
    [value] => GeeksforGeeks
)

Program 2:

php

<?php

// Create new Pair
$pair = new \Ds\Pair(["G", "GeeksforGeeks"], [1, 2]);

// Display the pair element
var_dump($pair);

// Use copy() function
$pair->copy();

echo "Copied pair elements:\n";

// Display the pair element
var_dump($pair);

?>

Output:

object(Ds\Pair)#1 (2) {
  ["key"]=>
  array(2) {
    [0]=>
    string(1) "G"
    [1]=>
    string(13) "GeeksforGeeks"
  }
  ["value"]=>
  array(2) {
    [0]=>
    int(1)
    [1]=>
    int(2)
  }
}
Copied pair elements:
object(Ds\Pair)#1 (2) {
  ["key"]=>
  array(2) {
    [0]=>
    string(1) "G"
    [1]=>
    string(13) "GeeksforGeeks"
  }
  ["value"]=>
  array(2) {
    [0]=>
    int(1)
    [1]=>
    int(2)
  }
}

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