代碼實現

<?php namespace Service\Controller;use Think\Controller;class BbsController extends Controller {/*** 留言大廳*/public function index(){$bbs = M('bbs')->where(array('pid'=>0))->order('id desc')->select(); //uid聯合用戶表foreach ($bbs as &$v){$re = M('bbs')->where(array('pid'=>$v['id']))->order('id desc')->find();$v['reply'] = $re['content'];}$this->assign('bbs',$bbs);$this->display();// $this->websucess('100000','y',$bbs);}public function addpage(){$this->display();}/*** 添加留言*/public function add(){$uid = $_POST['uid'];$id = $_POST['id'];$content = $_POST['content'];if ($id){$data = array( // 'uid'=>$this->uid,'uid'=>$uid,'content'=>$content,'status'=>0,'type'=>1,'pid'=>$id,'add_time'=>time());}else{$data = array( // 'uid'=>$this->uid,'uid'=>$uid,'content'=>$content,'status'=>0,'type'=>1,'pid'=>0,'add_time'=>time());}$re = M('bbs')->add($data);if ($re){$this->success('添加成功','/service/bbs/index');}else{$this->success('添加失敗','/service/bbs/add_page');}}/*** 留言詳請*/public function detail(){ // $id = $_POST['id'];$id =1;$re = self::recursionbbs($id);foreach ($re as $v){echo str_repeat('--',$v['level']).$v['uid'].$v['content']."<br>";}// $this->websucess('100000','y',$re);}/*** 遞歸出所有的留言信息* @param $id 留言id*/public function recursionbbs($id,$level=0){static $arr = array();$results = M('bbs')->where(array('pid'=>$id))->select();foreach ($results as &$result){if ($result){$result['level']=$level;$arr[] = $result;self::recursionbbs($result['id'],$level+1);}else{return ;}}return $arr;}}

主要就是遞歸

數據表設計

CREATE TABLE `yixiang_bbs` (`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主鍵',`uid` int(11) NOT NULL COMMENT '用戶id',`content` varchar(200) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '留言內容',`pid` int(11) NOT NULL COMMENT '父級id',`status` int(11) NOT NULL COMMENT '狀態',`type` int(11) NOT NULL COMMENT '類型',`add_time` int(11) NOT NULL COMMENT '添加時間',PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

總結

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