序列化数组保存到PHP和排序依据

Question

的mysql这是JavaScript的序列化数组：

[{"id":1},{"id":2},{"id":3,"children":[{"id":4,"children":[{"id":5},{"id":6},{"id":7}]},{"id":8}]}] 

如何保存这（动态）与PHP到mysql是这样的：

*********************************** 
| id | subsite_id | orderby | 
    1   0   0 
    2   0   1 
    3   0   2 
    4   3   0 
    5   4   0 
    6   4   1 
    7   4   2 
    8   3   1 
*********************************** 

谢谢回答。

Answer 1

这可能不是最好的解决方案，但它肯定是a的解决方案。最近，我了解到RecursiveIterator和他们的表弟RecursiveIteratorIterator。所以，我把它用在我编码的所有东西上（相关的XKCD：https://xkcd.com/208/）。

我很快就砍死这件事：

class ChildIDIterator implements RecursiveIterator{ 
    private $_array; 
    private $_position = 0; 
    private $_parent; 

    public function __construct(array $array, $parent=0) { 
     $this->_array = $array; 
     $this->_parent = $parent; 
    } 

    function valid(){ 
     return isset($this->_array[$this->_position]); 
    } 

    function current() { 
     return $this->_array[$this->_position]['id']; 
    } 

    function next() { 
     $this->_position++; 
    } 

    function rewind() { 
     $this->_position = 0; 
    } 

    function key() { 
     return $this->_position; 
    } 

    function hasChildren(){ 
     return isset($this->_array[$this->_position]['children']); 
    } 

    function getChildren(){ 
     return new self(
      $this->_array[$this->_position]['children'], 
      $this->_array[$this->_position]['id'] 
     ); 
    } 

    function getParent(){ 
     return $this->_parent; 
    } 
} 

在你的（解码）阵列该递归迭代和返回ID值。要使用它，你可以这样做：

$json = '[{"id":1},{"id":2},{"id":3,"children":[{"id":4,"children":[{"id":5},{"id":6},{"id":7}]},{"id":8}]}]'; 

$array = json_decode($json, TRUE); 

$iterate = new RecursiveIteratorIterator(new ChildIDIterator($array), RecursiveIteratorIterator::SELF_FIRST); 

foreach($iterate as $order=>$id){ 
    echo "UPDATE sites SET subsite_id={$iterate->getParent()}, orderby={$order} WHERE id={$id};\n"; 
} 

DEMO：https://eval.in/57189