Problem Statement: Given five positive integers, find the minimum and maximum values that can be calculated by summing exactly four of the five integers. Then print the respective minimum and maximum values as a single line of two space-separated long integers. Link: https://www.hackerrank.com/challenges/mini-max-sum/problem

Mini-MaxSum.php

function miniMaxSum($arr) {

    $sumValue = [];

    foreach($arr as $key => $integer)
    {
        $sumValue[] = array_sum(array_filter($arr, function($innerKey) use ($key){
            return $innerKey !== $key;
        },ARRAY_FILTER_USE_KEY));
    }

//      You can also use array_walk, this was for demonstration purpose
//
//    array_walk($arr, function($value, $key, $array) use(&$sumValue){
//
//        $sumValue[] = array_sum(array_filter($array, function($innerKey) use ($key){
//            return $innerKey !== $key;
//        },ARRAY_FILTER_USE_KEY));
//
//    },$arr);

        echo min($sumValue) . " " . max($sumValue);


//    one liner solution by little_foot on hackerrank, i am impressed so I had to add it here.
//    echo(array_sum($arr)-max($arr))." ".(array_sum($arr)-min($arr)); 

}