如何在PHP中计算数组级别“深”数并计算数组每个级别上的总元素

Question

我正在尝试在函数中执行递归数组以获取多维数组的所有级别编号和每个级别的总元素计数。

我需要帮助来实现这个目标我是堆栈，无法想出好的解决方案。

我的数据

$tree = array(
        'room1' => array(
                'room5',
                'room6'
            ),
        'room2' => array(
                'room5',
                'room6'
            ),
        'room3' => array(
                'room7' => array(
                        'room12' => array(
                                'room14',
                                'room15'
                            ),
                        'room13'
                    ),
            ),
        'room4' => array(
                'room8',
                'room9',
                'room10',
                'room11'
            )
);

想要的结果

Array(
    'level1' => 4,
    'level2' => 9,
    'level3' => 2,
    'level4' => 2
)

我的代码

function treeOut($tree)
{
    $markup = '';
    $count = 0;
    foreach($tree as $branch => $twig)
    {
        $count++;
        ((is_array($twig)) ? treeOut($twig,$count) : $count++;
    }
    return $count

}

echo treeOut($tree);

Answer 1

第一次尝试

function treeOut($tree, $level=0, $counts=[])
{
  if(! isset($counts[$level])) $counts[$level] = 0; 
  foreach($tree as $branch => $twig)
    {
        $counts[$level]++;
        if(is_array($twig)) {
          $counts = treeOut($twig, $level+1, $counts);
          }
    }
    return $counts;
}

print_r(treeOut($tree));

demo