Hacker Rank Problem Solving in PHP - Simple Array Sum

HackerRank Problem Solving - Simple Array Sum

Given an array of integers, find the sum of its elements.

For example, if the array ar = [1, 2, 3], 1 + 2 + 3 = 6, so return 6.

Function Description

Complete the simpleArraySum function in the editor below. It must return the sum of the array elements as an integer.

simpleArraySum has the following parameter(s):

• ar: an array of integers

Input Format

The first line contains an integer, n, denoting the size of the array.
The second line contains n space-separated integers representing the array's elements.

Output Format

Print the sum of the array's elements as a single integer.

Solution in PHP:

<?php

/*
* Complete the 'simpleArraySum' function below.
*
* The function is expected to return an INTEGER.
* The function accepts INTEGER_ARRAY ar as parameter.
*/

function simpleArraySum($ar) {
   // Write your code here
   $arraySum = array_sum($ar);
   return $arraySum;
}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$ar_count = intval(trim(fgets(STDIN)));

$ar_temp = rtrim(fgets(STDIN));

$ar = array_map('intval', preg_split('/ /', $ar_temp, -1, PREG_SPLIT_NO_EMPTY));

$result = simpleArraySum($ar);

fwrite($fptr, $result . "\n");

fclose($fptr);