如何使用PHP开发商城功能：搭建商品搜索和过滤系统

<?php

$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

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

// 检测连接
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
?>

<?php

// 获取用户输入的关键词
$keyword = $_GET["keyword"];

// 查询满足关键词的商品
$sql = "SELECT * FROM products WHERE name LIKE '%$keyword%' OR description LIKE '%$keyword%'";
$result = $conn->query($sql);

// 输出搜索结果
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "商品名称：" . $row["name"]. " - 价格：" . $row["price"]. "<br>";
    }
} else {
    echo "未找到相关商品";
}
?>

<?php

// 获取用户选择的分类和品牌
$category = $_GET["category"];
$brand = $_GET["brand"];

// 构建SQL查询语句
$sql = "SELECT * FROM products WHERE 1=1";

if (!empty($category)) {
    $sql .= " AND category = '$category'";
}

if (!empty($brand)) {
    $sql .= " AND brand = '$brand'";
}

// 执行查询
$result = $conn->query($sql);

// 输出过滤结果
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "商品名称：" . $row["name"]. " - 价格：" . $row["price"]. "<br>";
    }
} else {
    echo "未找到相关商品";
}
?>