构建财务预算报表功能的企业资源计划（ERP）系统的PHP开发

CREATE TABLE `budget` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `year` int(4) NOT NULL,
  `month` int(2) NOT NULL,
  `amount` decimal(10,2) NOT NULL,
  PRIMARY KEY (`id`)
);

<form action="save_budget.php" method="post">
  <label for="year">年份：</label>
  <input type="text" id="year" name="year" required><br>
  <label for="month">月份：</label>
  <input type="text" id="month" name="month" required><br>
  <label for="amount">金额：</label>
  <input type="text" id="amount" name="amount" required><br>
  <button type="submit">保存</button>
</form>

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

$year = $_POST['year'];
$month = $_POST['month'];
$amount = $_POST['amount'];

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

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

// 插入数据
$sql = "INSERT INTO budget (year, month, amount) VALUES ('$year', '$month', '$amount')";

if ($conn->query($sql) === TRUE) {
    echo "数据保存成功";
} else {
    echo "保存失败: " . $conn->error;
}

$conn->close();
?>

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

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

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

// 查询数据
$sql = "SELECT * FROM budget";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "年份: " . $row["year"]. " - 月份: " . $row["month"]. " - 金额: " . $row["amount"]. "<br>";
    }
} else {
    echo "没有数据";
}

$conn->close();
?>