樹的輸出爲字符串

Question

我的表[cat_id,title,pid]。我需要讓所有的孩子子類ID`s採用以下格式：

[1] =>Array ([cat_id] => 2 [title] => TEST [pid] => 1), 

[2] =>Array ([cat_id] => 3 [title] => TEST [pid] => 1), 

[3] =>Array ([cat_id] => 4 [title] => TEST [pid] => 2), 

[4] =>Array ([cat_id] => 5 [title] => TEST [pid] => 3) 

目的 - 用孩子的的ID`s，讓所有這些項目。

我試圖做一些如下面的代碼，但它不工作：

public function get_ids($tree,$cid = 0) 
{ 

    $data = $this->db->select('cat_id, title, pid') 
        ->where('pid',$cid) 
        ->get('catalog'); 

    $result = array_push($tree,$data->result_array()); 

    if($data->num_rows() > 0){ 

     foreach ($data->result_array() as $r) { 

      return $this->get_ids($result,$r['cat_id']); 

     } 
    } 
    else{ 
     return $result; 
    } 
} 

也許有更好的辦法？

Answer 1

請嘗試下面的代碼，通過給定的父ID來獲取所有子ID。

function fnGetChildCatelogs($id) { 

    $qry = "SELECT cat_id FROM catalog WHERE pid = $id"; 

    $rs = mysql_query($qry);  

    $arrResult = array();  

    if(mysql_num_rows($rs) > 0) { 

     # It has children, let's get them. 

     while($row = mysql_fetch_array($rs)) { 

      # Add the child to the list of children, and get its subchildren 

      $arrResult[$row['cat_id']] = fnGetChildCatelogs($row['cat_id']); 

     } 

    } 

    return $arrResult; 

}