php - 如何计算并显示二进制上的所有左子和右子

Question

我是 PHP 的新学习者，我正在修改一个简单的二进制站点。 我来这里寻求帮助，我如何计算我的下线对或总的左侧和右侧 一些用户。

这是我在数据库中的表的示例:

    +++++++++++++++++++++++++++++++++
    | childID | parentID | position +
    +++++++++++++++++++++++++++++++++
    | Admin   | NULL     | NULL     +
    | First   | Admin    | lft      +
    | Second  | Admin    | rgt      +
    | Third   | First    | lft      +
    | Fourth  | First    | rgt      +
    | Fift    | Second   | lft      +
    | Six     | Second   | rgt      +
    | Sevent  | Third    | lft      +
    | Eight   | Third    | rgt      +
    | Ninth   | Fourth   | lft      +
    | Tenth   | Fifth    | rgt      +

我有三个表，其中包含 childID 或其用户名、parentID 或其赞助商/推荐人，以及 position 表示他们的位置，即 lft(左)和 rgt(右)。

我打算做的是，我想向用户(或 childID)展示他们的 左(lft) 和右(rgt) 下线总数。

比如我想获取childID(First)左右所有下线的总和 基于我的表结构并将其显示给用户(第一)。

希望有人能帮助我解决这个问题。提前致谢。

Answer 1

我认为这可以通过修改你的脚本来解决。这将计算成员树二叉树中左右下线的数量。

制作成员(member)注册表:

CREATE TABLE IF NOT EXISTS `member` (
  `id` int(255) NOT NULL AUTO_INCREMENT,
  `username` varchar(55) CHARACTER SET utf8 NOT NULL,
  `upline` varchar(55) CHARACTER SET utf8 NOT NULL,
  `position` varchar(10) NOT NULL,
  `sponsor` varchar(55) CHARACTER SET utf8 NOT NULL,
  `_left` varchar(55) CHARACTER SET utf8 NOT NULL,
  `_right` varchar(55) CHARACTER SET utf8 NOT NULL,

  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ;

制作下线结构表:

CREATE TABLE IF NOT EXISTS `net_downline` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(60) NOT NULL,
  `upline` varchar(60) NOT NULL,
  `level` int(7) NOT NULL,
  `position` varchar(10) NOT NULL,

  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=9 ;

从简单或基本注册表中获取:

$newuser        = htmlentities(trim($_POST['user']));
$sponsor        = htmlentities(trim($_POST['sponsor']));    
$upline         = htmlentities(trim($_POST['upline']));
$position       = htmlentities(trim($_POST['position']));

在此过程中，应完成此树步骤:

// 1. register new member
$users->dummyRegister($newuser, $sponsor, $upline, $position);
// 2. update upline
$users->dummyUpdateUpline($newuser, $upline, $position);

// 3. create donwline structure of binary tree
$level=0;
$memberid=$newuser;
do{
$getdata=$users->dummyGetUpline($memberid); 
$uplne=$getdata[2]; 
$posi=$getdata[3];

$level++;
if($uplne!==''){
$users->dummyInsert_NetDownline($newuser, $uplne, $posi, $level);
}
$memberid=$uplne;
}
while($memberid!='');

该脚本的“用户”类:

<?php  // statr class

    class Users{

        private $db;
        public function __construct($database) {
            $this->db = $database;
        }   
    public function dummyRegister($username, $sponsor, $upline, $position, $today){

            $query  = $this->db->prepare("INSERT INTO `member` (`username`, `sponsor`, `upline`, `position`, `entry_date` ) VALUES (?, ?, ?, ?, ?) ");          
            $query->bindValue(1, $username);
            $query->bindValue(2, $sponsor);
            $query->bindValue(3, $upline);
            $query->bindValue(4, $position);
            $query->bindValue(5, $today);

            try{
                $query->execute();
             }catch(PDOException $e){
                die($e->getMessage());
            }   
        }

    public function dummyUpdateUpline($username, $upline, $position){

            if ($position=='left') {
            $query  = $this->db->prepare("UPDATE `member` SET `_left`=? WHERE username=? ");
            }elseif ($position=='right') {
            $query  = $this->db->prepare("UPDATE `member` SET `_right`=? WHERE username=? ");
            }

            $query->bindValue(1, $username);
            $query->bindValue(2, $upline);

            try{
                $query->execute();

            }catch(PDOException $e){
                die($e->getMessage());
            }   
        }

    public function dummyUpdateUpline($username, $upline, $position){

            if ($position=='left') {
            $query  = $this->db->prepare("UPDATE `member` SET `_left`=? WHERE username=? ");
            }elseif ($position=='right') {
            $query  = $this->db->prepare("UPDATE `member` SET `_right`=? WHERE username=? ");
            }

            $query->bindValue(1, $username);
            $query->bindValue(2, $upline);

            try{
                $query->execute();

            }catch(PDOException $e){
                die($e->getMessage());
            }   
        }

    public function dummyUpdateUpline($username, $upline, $position){

            if ($position=='left') {
            $query  = $this->db->prepare("UPDATE `member` SET `_left`=? WHERE username=? ");
            }elseif ($position=='right') {
            $query  = $this->db->prepare("UPDATE `member` SET `_right`=? WHERE username=? ");
            }

            $query->bindValue(1, $username);
            $query->bindValue(2, $upline);

            try{
                $query->execute();

            }catch(PDOException $e){
                die($e->getMessage());
            }   
        }

    public function dummyGetUpline($newuser) {// for demo

            $query = $this->db->prepare("SELECT * FROM `member` WHERE `username`= ?");
            $query->bindValue(1, $newuser);

            try{
                $query->execute();
                $rows = $query->fetch();

                return $rows;//['upline'];

            } catch(PDOException $e){
                die($e->getMessage());
            }
        }

    public function dummyInsert_NetDownline($newuser, $upline, $posi, $level){// for demo

            $query  = $this->db->prepare("INSERT INTO `net_downline` (`username`, `upline`, `position`, `level` ) VALUES (?, ?, ? ,?) ");
            $query->bindValue(1, $newuser);
            $query->bindValue(2, $upline);
            $query->bindValue(3, $posi);
            $query->bindValue(4, $level);

            try{
                $query->execute();

            }catch(PDOException $e){
                die($e->getMessage());
            }   
        }   

    }// endclass

创建initial.php并将其放在您的注册php脚本的顶部:

<?php  
if(!isset($_SESSION)) { session_start(); }
require 'conn/database.php'; // in folder conn
require 'clas/users.php';   // in folder class
$users      = new Users($db);
} 
?>

这用于处理数据库连接(clas/database.php 脚本):

<?php 
$config = array(
    'host'      => 'localhost',
    'username'  => 'root',
    'password'  => '',
    'dbname'    => 'sampledatabase'
);

$db = new PDO('mysql:host=' . $config['host'] . ';dbname=' . $config['dbname'], $config['username'], $config['password']);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

从这里您可以看到基于二叉树的上线的成员资格结构。通过统计与用户匹配的查询即可获得下线数量。

缺点是net_downline数据库会快速增长，导致系统将为任何新注册评估并重新安排结构。对于 level(n) 下线级别，它会更新并为单个新用户创建 n 条记录。

愿这里有人拥有最好的系统。请指教。