如何使用PHP开发微信小程序的任务导入功能？

<?php
    // 连接到云开发数据库
    $servername = "localhost";
    $username = "your_username";
    $passWord = "your_password";
    $database = "your_database";

    $conn = new Mysqli($servername, $username, $password, $database);
    if ($conn->connect_error) {
        die("连接失败: " . $conn->connect_error);
    }

    // 获取前端传递过来的任务数据
    $tasksJSON = $_POST['tasks'];
    $tasks = json_decode($tasksJson);

    // 将任务数据插入数据库
    foreach ($tasks as $task) {
        $sql = "INSERT INTO tasks (task_name, task_description) VALUES ('$task->name', '$task->description')";
        if ($conn->query($sql) === TRUE) {
            echo "任务导入成功";
        } else {
            echo "任务导入失败: " . $conn->error;
        }
    }

    $conn->close();
?>

wx.request({
    url: 'https://example.com/task-import.php',
    method: 'POST',
    data: {
        tasks: JSON.stringify(tasks)
    },
    success: function(res) {
        console.log(res.data);
    },
    fail: function(res) {
        console.error(res);
    }
});