Untitled

PHP count # of items in an object of a given property value
foreach($items as $item)
{
    if(????) //count of $item->folder_id > 1
       {
         //do something to $item->folder_id=1/$item->item_id=1
       }

       elseif(????) // cases where $item->item_id != $item->folder_id
       {
         //do something else to $item->folder_id=1/$item->item_id=2
       }

       else
       {
         //do something else to $item->folder_id=2/$item->item_id=3 and folder_id=3/item_id=4
       }
}

$totals = array();

foreach($items as $item) {
   $totals[$item->folder_id]++;
}

$callback = function($item) { return $item->folder_id; };
$result = array_count_values(array_map($callback, $items));

array(
    1 => 2,
    2 => 1,
    3 => 1,
);

foreach($results as $folder_id => $count) {
    if($count > 1) {
        // There were $count items with folder_id == $folder_id
    }
    // else blah blah
}

function count_items(Array $items, $folder_id) {
    return count(array_filter($items,
        function($item) use($folder_id) {
            return $item->folder_id === $folder_id;
        }
     ));
}

function folder_count($items, $num)
{
    $cnt = 0;
    foreach($items as $item)
    {
        if($item->folder_id > $num)
        {
            $cnt++;
        }
    }
    return $cnt;
}

foreach ($items as $item)
{
    if (folder_count($items, 1))
    {
        //do something to $item->folder_id=1/$item->item_id=1, item_id=2
    }
    else
    {
        //do something else to $item->folder_id=2/$item->item_id=3 and folder_id=3/item_id=4
    }
}