PHP | Ds\Map intersect() Function

Last Updated : 20 Mar, 2023

The Ds\Map::intersect() function is an inbuilt function in PHP, which is used to create a new map which contains the intersection with another map. Syntax:

 public Ds\Map::intersect( Ds\Map $map )

Parameter: This function accepts single parameter $map which holds the other map which contains the key of other elements. Return value: This function returns the intersection of current map with other map. Below programs illustrate the Ds\Map::intersect() function in PHP: Program 1:

php

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

// Creating a Map 
$map1 = new \Ds\Map(["1" => "10", 
            "3" => 30, "4" => 40]); 
            
// Creating another Map 
$map2 = new \Ds\Map(["2" => "20",
        "3" => 35, "5" => 50, "6" => 60]); 

// Use Ds\Map::intersect() function
print_r($map1 -> intersect($map2));

?>

Output:

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

)

Program 2:

php

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

// Creating a Map 
$map1 = new \Ds\Map([
    "1" => "Geeks",  
    "2" => "for",
    "3" => "Geeks"]);
            
// Creating another Map 
$map2 = new \Ds\Map([
    "2" => "for",
    "3" => "Geeks",
    "4" => "GeeksforGeeks"]);

// Use Ds\Map::intersect() function
print_r($map1 -> intersect($map2));

?>

Output:

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

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

)

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