PHP code tested for solving compare-the-triplets in https://www.hackerrank.com/challenges/compare-the-triplets/problem

compare-the-triplets.php

<?php 
/*
The problem is here:
https://www.hackerrank.com/challenges/compare-the-triplets/problem
Reference: Code for creating a simple php calculator for debugging
https://stackoverflow.com/questions/21445245/simple-php-calculator
*/
$result = "";

function compareTriplets($a, $b) {
    $r=array(0,0);
    for ($i = 0; $i < count($a); ++$i) {
        if($a[$i]>$b[$i]){
            $r[0]=$r[0]+1;
        } elseif($a[$i]<$b[$i]){
            $r[1]=$r[1]+1;
        }
    }
    return $r;
}

if(isset($_POST['submit']))
{   
$a = array_map('intval', preg_split('/ /', rtrim($_POST['n1']), -1, PREG_SPLIT_NO_EMPTY));

$b = array_map('intval', preg_split('/ /', rtrim($_POST['n2']), -1, PREG_SPLIT_NO_EMPTY));

$result = implode(" ", compareTriplets($a, $b));
}
?>

<form method="post">
<table align="center">
    <tr>
        <td><strong><?php echo $result; ?><strong></td>
    </tr>
    <tr>
        <td>Enter 1st Number</td>
        <td><input type="text" name="n1"></td>
    </tr>

    <tr>
        <td>Enter 2nd Number</td>
        <td><input type="text" name="n2"></td>
    </tr>
    <tr>
        <td></td>
        <td><input type="submit" name="submit" value="                =                "></td>
    </tr>

</table>
</form>