微信小程序之获取php后台数据库转化的json

php代码：

<?php
	// $username = array();
    // $password = array();
	$userandpass = array();

    include "con_mysql.php";

    $conn = con_mysql("localhost", "root", "", "supermarket");
    $sql = "SELECT username, password FROM sup_user;";
    $result = $conn->query($sql);
	if ($result->num_rows > 0)
	{
    
		while($row = $result->fetch_assoc()) // 将表中的数据都取出来
		{
    
			$u_p = array();
			// echo "username: ".$row['username']." password: ".$row["password"];
			$u_p['username'] = $row['username'];
			$u_p['password'] = $row['password'];
			$userandpass[] =  $u_p;
		}
	}
	// $userandpass['username'] = $username;
	// $userandpass['password'] = $password;
	echo json_encode($userandpass);
?>

js代码：

// index.js
// 获取应用实例
const app = getApp()

Page({
    
  data: {
    
    t:"hwllo"
  },
  onLoad: function(){
    
    var that = this;
    wx.request(
      {
    
        url:"http://127.0.0.1/SM/select_alluser.php",
        headers:{
    
          'content-type':'application/json'
        },
        method:'GET',
        success:res=>{
    
          that.setData({
    
            t:res.data
          })
        }
      }
    );
  }
})

wxml代码：

<view wx:for="{
    {t}}" wx:key="key">{
    {
    item.username}}</view>
<view wx:for="{
    {t}}" wx:key="key">{
    {
    item.password}}</view>

后台返回的数据：