Array Challenge.php

<?php
/*
Have a function Arr(strArr) read the array of strings stored in strArr which will contain only two elements, both of which will represent an array of positive integers. For example of strArr is ["[1, 2, 5, 6]", "[5, 2, 8, 11]"], and goal for this is to add the elements in corresponding locations from both arrays. For the example input, the program should do the following additions: [(1 + 5), (2 + 2), (5 + 8), (6 + 11)] which then equals [6, 4, 13, 17]. Return this resulting array in a string format with each element separated by a hyphen: 6-4-13-17.

If the two arrays do not have the same amount of elements, then simply append the remaining elements onto the new array.

Examples

Input: ["[5, 2, 3]", "[2, 2, 3, 10, 6]"]
Output: 7-4-6-10-6
Input: ["[1, 2, 1]", "[2, 1, 5, 2]"]
Output: 3-3-6-2
*/

function ArrayChallenge($strArr) {
 $arr1= explode(',',trim($strArr[0],'[]'));
 $arr2= explode(',',trim($strArr[1],'[]'));
$arr1=array_map('intval',$arr1);
$arr2=array_map('intval',$arr2);
if(count($arr1) != count($arr2)){
$n=max(count($arr1),count($arr2));
$arr1=array_pad($arr1,$n,0);
$arr2=array_pad($arr2,$n,0);
}
$out = array_map(function ($a,$b){
  return (string)($a+$b);
},$arr1,$arr2);
return implode('-',$out);
}
   
// keep this function call here  
echo ArrayChallenge(fgets(fopen('php://stdin', 'r')));  


?>