未捕获的错误：在布尔值上调用成员函数 get_result()

Question

<?php

require "conn.php";

$GroupName = "test";
$sql_query ="SELECT G_number FROM Group WHERE Group_Name like '$GroupName';";
$row = mysqli_query($conn,$sql_query);
$result = $row->get_result(); //error comes up here




$sql_query2 =$conn->prepare("SELECT Question, User_name,date FROM Post WHERE Group_number = '$result';");
$sql_query2->execute();
$sql_query2->bind_result($Question,$User_name,$date);

$post = array();

while($sql_query2->fetch()){

$temp = array();
$temp['Question'] = $Question;
$temp['User_Name'] = $User_name;
$temp['Date'] = $date;

array_push($post,$temp);



}
echo json_encode($post);
?>

当我将域放在 url 中时，我试图让 json 打印到 html 中，但我的日志中经常出现此错误：

" PHP 致命错误：未捕获的错误：调用成员函数 get_result() on boolean in /home/f7215owv4qzh/public_html/post_retrieval.php:8"

有人知道我做错了什么吗？我已经搜索了修复程序并将语法更改为无济于事。

Answer 1

试试这个方法

$result = $row->fetch_array();

或

$result =mysqli_fetch_array($row)