PHP | Ds\Map count() Function

The Ds\Map::count() function is an inbuilt function in PHP which is used to count the number of elements present in the Map. It also referred to the size of the Map.

Syntax:

int public Ds\Map::count()

Parameters: This function does not accept any parameter.

Return value: This function returns the number of elements present in the Map.

Below programs illustrate the Ds\Map::count() function in PHP:

Program 1:

<?php
// PHP program to illustrate the count()
// function of Ds\map

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

// Display the map elements
print_r($map);

echo "Number of elements present in map: ";
print_r($map->count());

?>

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
        )

)
Number of elements present in map: 3

Program 2:

<?php
// PHP program to illustrate the count()
// function of Ds\map

// Creating a Map
$map = new \Ds\Map(["1" => "10",
            "2" => "20", "3" => 30, "4" => 40]);

// Print map elements
print_r($map);

echo "Number of elements present in map: ";
print_r($map->count());

echo "\n";

// Creating another Map
$map = new \Ds\Map([1 => "Welcome",
            2 => "to", 3 => "GeeksforGeeks"]);

// Print map elements
print_r($map);

echo "Number of elements present in map: ";
print_r($map->count());

?>

Output:

Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => 1
            [value] => 10
        )

    [1] => Ds\Pair Object
        (
            [key] => 2
            [value] => 20
        )

    [2] => Ds\Pair Object
        (
            [key] => 3
            [value] => 30
        )

    [3] => Ds\Pair Object
        (
            [key] => 4
            [value] => 40
        )

)
Number of elements present in map: 4
Ds\Map Object
(
    [0] => Ds\Pair Object
        (
            [key] => 1
            [value] => Welcome
        )

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

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

)
Number of elements present in map: 3

Reference: https://www.php.net/manual/en/ds-map.count.php