array_intersect_key() function in php

array_intersect_assoc() function of PHP is used to create a new array by matching the keys of two or more arrays. It is an inbuilt function of PHP.

Syntax

Here,

$arr1,$arr2 and $arrN are PHP arrays.

Example:

<?php
$arr1= array("fruit1"=>"Apple","fruit2"=>"Banana","fruit3"=>"Orange","fruit4"=>"Pear");
$arr2= array("fruit5"=>"Banana","fruit6"=>"Orange","fruit3"=>"Grape","fruit4"=>"Litchi");
$result=array_intersect_key($arr1,$arr2);
echo "<pre>";
print_r($result);
?>

Output: