PHP を使用して分類された商品のクエリ機能を実装する

<?php
// 假设这里是连接数据库的代码
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// 获取分类参数
$category = $_GET['category'];

// 查询数据库中符合分类的商品
$sql = "SELECT * FROM products WHERE category = '$category'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // 输出数据
    while($row = $result->fetch_assoc()) {
        echo "商品名称: " . $row["name"]. " - 价格: " . $row["price"]. "<br>";
    }
} else {
    echo "0 结果";
}

$conn->close();
?>