PHPHugo

<?php
function maximumProduct($a){
  $i = 0; $j = 0; $max = 0; $tamanho = count($a);
  for($i = 0; $i < $tamanho; $i++){
    for($j = $i+1; $j < $tamanho; $j++){
      if($a[$i]*$a[$j] > $max && (($a[$i]*$a[$j]) % 3 === 0)){
        $max = $a[$i]*$a[$j];
      }
    }
  }
  return $max;
}

$arr1 = array(6,8,8,7,2,5);
echo maximumProduct($arr1);

$arr2 = array(1,9,2,4);
echo maximumProduct($arr2);


?>