<?php

$arry = ["Sudhir" , "Samay" , "Samartha" , "Shiv" , "Ram" , "Krishna" , "Ganesh"];

$array = [
        "fname" => "Sudhir",
        "lname" => "Gour",
        "city" => "Jaipur",
        "state" => "Rajasthan",
        "country" => "India"
    ];
    
$newArray = array_map("change" ,$array , $array_keys);

function change($value , $key){
    return $key => $value;
}

print_r($newArray);

// $altered = array_map("adder" , $arry);
// $altered = array_map( , $arry);

function adder($element , $addedString){
    return $element.$addedString;
}

// print_r($altered);