我收到此错误消息“未定义偏移量:0”。是什么原因以及如何解决? 这里是我的代码: <?php
$rows= mysqli_query ($con,"SELECT COUNT(Mobile) AS count FROM data Where Blood = '$bloodGroup'");
$count = mysqli_fetch_assoc($rows ) ;
我试图围绕isBreadwinner功能包裹我的头。为什么不将true传递给(**)函数。为什么收益成员:未定义 <script>
"use strict"
//creating a user object
let user = {
name : "Stackoverflow Developer",
age : 23
};