如何使用PHP编写自动化的商品库存盘点工具

$hostname = "localhost";
$username = "root";
$password = "password";
$database = "inventory";

$conn = new mysqli($hostname, $username, $password, $database);
if ($conn->connect_error) {
    die("连接数据库失败：" . $conn->connect_error);
}

$sql = "SELECT * FROM products";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $product_id = $row['id'];
        $product_name = $row['name'];
        $stock_qty = $row['stock_qty'];
        
        // 写入相应的处理逻辑
    }
} else {
    echo "没有查询到商品信息。";
}

$report = array();

while ($row = $result->fetch_assoc()) {
    $product_id = $row['id'];
    $product_name = $row['name'];
    $stock_qty = $row['stock_qty'];
    $counted_qty = // 根据实际情况填写盘点数量；
    
    if ($stock_qty != $counted_qty) {
        $report[] = array(
            'product_id' => $product_id,
            'product_name' => $product_name,
            'stock_qty' => $stock_qty,
            'counted_qty' => $counted_qty
        );
    }
}

// 生成报告
if (!empty($report)) {
    foreach ($report as $item) {
        echo "商品编号：" . $item['product_id'] . "
";
        echo "商品名称：" . $item['product_name'] . "
";
        echo "实际库存数量：" . $item['stock_qty'] . "
";
        echo "盘点数量：" . $item['counted_qty'] . "

";
    }
} else {
    echo "库存盘点结果一致，没有差异。";
}

if (!empty($report)) {
    echo "<table>";
    echo "<tr><th>商品编号</th><th>商品名称</th><th>实际库存数量</th><th>盘点数量</th></tr>";
    
    foreach ($report as $item) {
        echo "<tr>";
        echo "<td>" . $item['product_id'] . "</td>";
        echo "<td>" . $item['product_name'] . "</td>";
        echo "<td>" . $item['stock_qty'] . "</td>";
        echo "<td>" . $item['counted_qty'] . "</td>";
        echo "</tr>";
    }
    
    echo "</table>";
} else {
    echo "库存盘点结果一致，没有差异。";
}