gistfile1.php

<?php

function sum($a, $b)
{
  return $a + $b;
}


function myfunc($input)
{
  if(is_array($input))
  {
    $counts = array_map("myfunc", $input);
    return array_reduce($counts, "sum");
  }
  else if(is_int($input))
  {
    return $input;
  }
  else
  {
    return array_reduce(array_values($input), "sum");
  }
}

$conversionSets = array(
    "100" => array(
        array(
            "conversions" => 22,
            "apples" => 5
        ),
        array(
            "conversions" => 8
        )
    ),
    "200" => array(
        array(
            "conversions" => 4
        ),
        array(
            "conversions" => 16
        )
    )
);

print(myfunc(45)); # => 45
print("\n");
print(myfunc(array(1, 2, 3))); # => 6
print("\n");
print(myfunc(array("hi" => 1, "hai" => 2))); # => 3
print("\n");
print(myfunc($conversionSets)); # => BZZT, 55 instead of 50
print("\n");