在PHP中从二维数组创建非二叉树

class Node {
    public $value;
    public $children;

    public function __construct($value) {
        $this->value = $value;
        $this->children = array();
    }
}

function createTree($array) {
    $root = new Node($array[0][0]); // 创建根节点

    // 递归创建子节点
    foreach ($array[0][1] as $child) {
        $root->children[] = createTree(array($child));
    }

    return $root;
}

$array = array(
    array('A', array(
        array('B', array(
            array('D', array()),
            array('E', array())
        )),
        array('C', array(
            array('F', array()),
            array('G', array())
        ))
    ))
);

$tree = createTree($array);