如何在 php 中使用 bind_result() 而不是 get_result()

问题描述

我正在为 uni 开发一个项目，并且一直在 testing server 上使用以下代码从基于 的表中获取所有设备user_id:

I'm working on a project for uni and have been using the following code on a testing server to get all devices from a table based on a user_id:

public function getAllDevices($user_id) {
    $stmt = $this->conn->prepare("SELECT * FROM devices WHERE  primary_owner_id = ?");
    $stmt->bind_param("i", $user_id);
    $stmt->execute();
    $devices = $stmt->get_result();
    $stmt->close();
    return $devices;
}

这在我的测试服务器上运行良好，但在迁移到大学项目服务器时返回此错误:

This worked fine on my testing server but returns this error when migrating over to the university project server:

Call to undefined method mysqli_stmt::get_result()

一些谷歌搜索建议使用 bind_result() 而不是 get_result() 但我不知道如何在表中执行此all fields.大多数示例只显示返回 one field

Some googling suggests using bind_result() instead of get_result() but I have no idea how to do this all fields in the table. Most examples only show returning one field

任何帮助将不胜感激

推荐答案

假设你不能使用 get_result() 并且你想要一个设备数组，你可以这样做:

Assuming you can't use get_result() and you want an array of devices, you could do:

public function getAllDevices($user_id) {
    $stmt = $this->conn->prepare("SELECT device_id, device_name, device_info FROM devices WHERE  primary_owner_id = ?");
    $stmt->bind_param("i", $user_id);
    $stmt->execute();
    $stmt->bind_result($id, $name, $info);
    $devices = array();

    while($stmt->fetch()) {
        $tmp = array();
        $tmp["id"] = $id;
        $tmp["name"] = $name;
        $tmp["info"] = $info;
        array_push($devices, $tmp);
    }
    $stmt->close();
    return $devices;
}

这会创建一个临时数组并存储其中每一行的数据，然后将其推送到主数组.据我所知，您不能在 bind_result() 中使用 SELECT *.相反，您将不得不在 SELECT

This creates a temporary array and stores the data from each row in it, and then pushes it to the main array. As far as I'm aware, you can't use SELECT * in bind_result(). Instead, you will annoyingly have to type out all the fields you want after SELECT

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