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<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
