微信小程序 评论功能实现

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_35713752/article/details/82468514

前端

              <textarea class='the_prw_in' bindinput='bindblur' cursor-spacing="130" placeholder='说点什么吧...' maxlength="76">
              </textarea>
              <view class='the_prw_btn' bindtap='btn_send'>
                留言
              </view>

          <view>评论内容：</view>
          <block wx:for="{{pl_list}}" wx:key="index">
            <view class='the_msg' wx:if='{{item.input_value!=null}}'>
              <!-- <view class='msg_left'>
                <view class='msg_avatar_v'>
                  <image class='msg_avatar' src='{{msg_data.avatar}}'></image>
                </view>
              </view> -->
              <view class='msg_right'>
                <!-- <view class='msg_right_name'>
                  {{msg_data.nicename}}
                </view> -->
                <view class='msg_right_text'>
                  <text>{{item.input_value}}</text>
                </view>
                <view class='gap'>
                </view>
              </view>
            </view>
          </block>

js: 默认展示历史评论，评论后也刷新页面，连带此次评论内容一起展示。

  var bindblur ;
Page({
  bindblur:function(e){
    console.log('1111111:', e.detail.value)
    bindblur = e.detail.value;
  },

  onLoad: function (a) {
    var that = this;
    actid = a.id;
    // 查询评论fetch
    wx.request({
    url: 'https://m.yishushe.net/addons/up_text.php',
      method: 'POST',
      header: {
        'content-Type': 'application/x-www-form-urlencoded',
        'Accept': 'application/json'
      },
      data: {
        act_id: actid
      },
      success: function (result) {
        that.setData({
          pl_list: result.data.reverse(),
        })
      },
      fail: res => {
        wx.showToast({
          title: '网络不好哟',
          image: '/image/wrong.png',
          duration: 3000
        })
      }
    })
},
  btn_send: function () {
    var that = this
    //添加评论
    console.log('文章id：act_id :', actid);
    console.log('用户缓存id：user_id :', user_id);
    console.log('文本输入框: input_value :', bindblur);
    wx.request({
      url: 'https://m.yishushe.net/addons/up_text.php',
      method: 'POST',
      header: {
        'content-Type': 'application/x-www-form-urlencoded',
        'Accept': 'application/json'
      },
      data: {
        act_id: actid,
        user_id: user_id,
        input_value: bindblur
      },
      success: function (result) {
        that.setData({
          pl_list: result.data.reverse(),
          input_value: "",
        })
      },
      fail: res => {
        wx.showToast({
          title: '网络不好哟',
          image: '/image/wrong.png',
          duration: 3000
        })
      }
    })
  }
})

后端php 源码：

<?php
    header("Content-Type:text/html;charset=utf8"); 
	header("Access-Control-Allow-Origin: *"); //解决跨域
	header('Access-Control-Allow-Methods:POST');// 响应类型  
	header('Access-Control-Allow-Headers:*'); // 响应头设置 
    $link=mysql_connect("localhost","root","root"); 
    mysql_select_db("weiqing", $link); //选择数据库
    mysql_query("SET NAMES utf8");//解决中文乱码问题
    //$username = $_POST['username'];
    //$avatarUrl = $_POST['avatarUrl'];
    $act_id = $_POST['act_id'];
	if($_POST['input_value']){
    $user_id = $_POST['user_id'];
    $input_value = $_POST['input_value'];
	//echo $avatarUrl."----time:". $time."----iv:".$iv."----inputValue:". $inputValue;
	//插入数据到数据库 
	$strsql = "insert into pinglun (act_id,user_id,input_value) values('$act_id','$user_id','$input_value')";
	//mysql_query() 函数执行一条 MySQL 查询。SELECT，SHOW，EXPLAIN 或 DESCRIBE 都需要用这个函数执行
	$result = @mysql_query($strsql);
	
	}
	
    $q = "SELECT * FROM pinglun"; //SQL查询语句 SELECT * FROM 表名
    $rs = mysql_query($q); //获取数据集
    if(!$rs){die("数据库没有数据!");}
	
	//循环读取数据并存入数组对象
    $dlogs;$i=0;
    while($row=mysql_fetch_array($rs))
    {
		if($act_id ==$row["act_id"]){
        $dlog["act_id"]=$row["act_id"];
        $dlog["user_id"]=$row["user_id"];
        $dlog["input_value"]=$row["input_value"];
		}
        //$dlog["avatarUrl"]=$row["avatarUrl"];
        //$dlog["username"]=$row["username"];
        $dlogs[$i++]=$dlog;
    }
	
	
    //以json格式返回html页面
   
    echo urldecode(json_encode($dlogs));
?>

如果php返回报错就找到php-ini 配置文件 ，把

display_errors = On
改为
display_errors = Off

禁止php报错