如何使用PHP开发记账系统的账单归档功能 - 提供账单归档功能的开发指南

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

<?php
$amount = 100.00;
$category = "餐饮";
$date = time();
$description = "午餐";

$sql = "INSERT INTO bill (amount, category, date, description)
VALUES ($amount, '$category', $date, '$description')";

if ($conn->query($sql) === TRUE) {
    echo "账单添加成功";
} else {
    echo "添加账单失败: " . $conn->error;
}

<?php
$bill_id = 1;
$archive_date = date("Y-m-d");
$archive_file = "archive/bill_".$bill_id."_".$archive_date.".pdf";

$sql = "INSERT INTO archive (bill_id, archive_date, archive_file)
VALUES ($bill_id, '$archive_date', '$archive_file')";

if ($conn->query($sql) === TRUE) {
    echo "账单归档成功";
} else {
    echo "归档账单失败: " . $conn->error;
}

// 将账单数据从bill表中移除
$sql = "DELETE FROM bill WHERE id = $bill_id";

if ($conn->query($sql) === TRUE) {
    echo "账单删除成功";
} else {
    echo "删除账单失败: " . $conn->error;
}

<?php
$sql = "SELECT * FROM archive";

$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "归档记录ID: " . $row["id"]. " - 归档日期: " . $row["archive_date"]. " - 归档文件路径: " . $row["archive_file"]. "<br>";
    }
} else {
    echo "没有查询到归档记录";
}