Compare the Triplets

compareTriplets.php

<?php
$_fp = fopen ("php://stdin","r");
$a = explode(' ', trim(fgets($_fp)));
$b = explode(' ', trim(fgets($_fp)));
array_walk($a, function(&$value){$value = intval($value);});
array_walk($b, function(&$value){$value = intval($value);});
$pointsA = 0;
$pointsB = 0;
for ($i = 0; $i < count($a); $i++) {
    if ($a[$i] > $b[$i]) $pointsA++;
    elseif ($b[$i] > $a[$i]) $pointsB++;
}
echo $pointsA, ' ', $pointsB;
?>

mine: 
<?php
function compareTriplets($a, $b) {
    $el1=0;
    $el2=0;
    for($i=0; $i<3; $i++)
    { 
        if($a[$i]>$b[$i])
        {
           $el1 +=1; 
        }
        if($a[$i]<$b[$i])
        {
           $el2 +=1; 
        }
    }
    return $el1.' '.$el2;
}
$a = array_map('intval', preg_split('/ /', $a_temp, -1, PREG_SPLIT_NO_EMPTY));
$b_temp = rtrim(fgets(STDIN));
$b = array_map('intval', preg_split('/ /', $b_temp, -1, PREG_SPLIT_NO_EMPTY));
$result = compareTriplets($a, $b);
fwrite($fptr,$result. "\n");
fclose($fptr);