How to count array level "deep" number and count total elements on each level of an array in PHP

Question

I'm trying to do recursive array in function to get all level number and the total element counts on each level for a multi-dimensional array.

I need help to achieve this goal I'm stack and can't come up of good solution.

My data

$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'
            )
);

Desired Result

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

My Code

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

}

echo treeOut($tree);

Possible duplicate of Recursive count elements of multidimensional array — Andreas
– Andreas, Commented Jan 30, 2018 at 17:31

splash58 · Accepted Answer · 2018-01-30 17:34:10Z

3

As 1st try

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

answered Jan 30, 2018 at 17:34

splash58

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2 Comments

moreishi Over a year ago

hi @splash58! Than you! This is what Im looking for that gives me headache. Thank you very much!

ino Over a year ago

@moreishi Please accept this answer since it works! Thank you splash58

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