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PHP | Ds\Map put() Function

Last Updated : 21 Aug, 2019
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The Ds\Map::put() function is an inbuilt function in PHP, which is used to associates a key with a value. Syntax: 
void public Ds\Map::put( $key, $value )
Parameter: This function accepts two parameters as mentioned above and described below:
  • $key: It is used to hold the key to associate the value.
  • $value: It is used to hold the value of key.
Return value: This function does not return any value. Below programs illustrate the Ds\Map::put() function in PHP: Program 1: php 
<?php 

// Declare a new map
$map = new \Ds\Map();

$map->put("a", "Geeks");
$map->put("b", "for");
$map->put("c", "Geeks");

// Display output
print_r($map);

// Declare a new map
$map = new \Ds\Map();

$map->put("a", "Computer");
$map->put("b", "Science");
$map->put("c", "Portal");

// Display output
print_r($map);

?>
Output: 
Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => a
            [value] => Geeks
        )

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

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

)
Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => a
            [value] => Computer
        )

    [1] => Ds\Pair Object
        (
            [key] => b
            [value] => Science
        )

    [2] => Ds\Pair Object
        (
            [key] => c
            [value] => Portal
        )

)
Program 2: php 
<?php 

// Declare a new map
$map = new \Ds\Map();

$map->put("Geeks1", "computer");
$map->put("Geeks2", "science");
$map->put("Geeks3", 5);
$map->put("Geeks3", 20);

// Display result
var_dump($map);

?>
Output: 
object(Ds\Map)#1 (3) {
  [0]=>
  object(Ds\Pair)#2 (2) {
    ["key"]=>
    string(6) "Geeks1"
    ["value"]=>
    string(8) "computer"
  }
  [1]=>
  object(Ds\Pair)#3 (2) {
    ["key"]=>
    string(6) "Geeks2"
    ["value"]=>
    string(7) "science"
  }
  [2]=>
  object(Ds\Pair)#4 (2) {
    ["key"]=>
    string(6) "Geeks3"
    ["value"]=>
    int(20)
  }
}
Reference: https://www.php.net/manual/en/ds-map.put.php

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