使用foreach修复/改进if语句不为null

Question

Having this code:

$main = !empty($searchResults['main']) ? $searchResults['main'] : null;
$second = !empty($searchResults['second']) ? $searchResults['second'] : null;
$third = !empty($searchResults['third']) ? $searchResults['third'] : null;

#if(($main) || ($second) || ($third))
if((($main) || ($second) || ($third)) !== NULL)
{
    foreach ((array)$searchResults as $key => $value)
    {
        switch ($key)
        {
            case "main":
            ....

What can it be done to fix/improve this code?

By fix I mean that I need a way to avoid running switch on empty keys

Answer 1

foreach ($searchResults as $key => $value)
{
  if(empty($value)) continue;
  ...