How do I format Nested Set Model data into an array?

Question

Let\'s dig in the main problem right away, I have the input like this

$category = array(
  \'A\' => array(\'left\' => 1, \'right\' => 8),
  \'B\' =&         


        

Answer 1

There is a bug with above function. The top category of second array of the @tree is removed. This is the fix:

foreach ($category as $name => $range) {
    $line[$range['left']] = $name;
    $line[$range['right']] = $name;
}

ksort($line);
$tree = array();
$count = 0;

foreach ($line as $name) {
    if (!isset($open[$name])) {
        $open[$name] = true;
        $count++;
    }
    else {
        if ($count > 0) {
            $count = 0;
            $tree[] = array_keys($open);
        }
        unset($open[$name]);
    }
}