Transpose a PHP multidimensional array with predefined keys

Question

I have a multidimensional array with 3 keys (\"length\", \"width\" and \"height). Each key is associated with an array of values:

$data = [
    \"length\" =>          


        

Answer 1

The following function will do the job:

function transpose($data)
{
    $result = [];
    $keys = array_keys($data);
    for ($row = 0,  $rows = count(reset($data)); $row < $rows; $row++) {
        foreach ($keys as $key) {
            $result[$row][$key] = $data[$key][$row];
        }
    } 

    return $result;
}

Notice that the function is a general solution it doesn’t depend on the name of the keys nor on the number of entries of each key.