Second-hand recycling website uses precise search function developed in PHP

The second-hand recycling website uses the precise search function developed by PHP

With the development of society, the transactions of second-hand goods are becoming increasingly frequent. In order to meet the needs of the majority of users for second-hand goods, many second-hand recycling websites have emerged. The search function of the website, as a key tool for users to find their favorite second-hand products, must be efficient and accurate. This article will introduce how to use PHP to develop a second-hand recycling website with precise search functions, and give corresponding code examples.

1. Demand analysis

Before developing the precise search function of the second-hand recycling website, we need to analyze the user's needs. When users search, they usually enter keywords. The search results need to accurately match the user's input and provide corresponding recommended results. In addition to keywords, users may also filter based on product category, price range, region and other conditions. Therefore, we need to implement the following functions:
1. Keyword search: The user enters a keyword and returns a list of products matching the keyword.
2. Category filtering: The user selects the category of the product and returns a list of products under that category.
3. Price filtering: The user sets a price range and returns a list of products with prices within this range.
4. Region filtering: The user selects a region and returns a list of products in that region.
5. Multi-condition combination filtering: Users can filter based on multiple conditions and return a list of products that meet the conditions.

2. Database design

Before implementing the search function, we need to design a database and store second-hand product information. The following is a simplified database design example:

Table: goods
Fields: id (int, auto-incrementing primary key), name (varchar, product name), price (float, product price), category ( int, product category), location (varchar, product location)

We can add more fields according to actual needs.

3. Implementation of search function

Next, we use PHP language to implement precise search function.

1. Keyword search function implementation

// 接收用户输入的关键字
$keyword = $_GET['keyword'];

// 查询数据库，返回匹配的商品列表
$sql = "SELECT * FROM goods WHERE name LIKE '%$keyword%'";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    // 处理每个商品信息的显示
    echo $row['name'] . ' - ' . $row['price'] . ' - ' . $row['location'] . '
';
}

2. Classification filtering function implementation

// 接收用户选择的类别
$category = $_GET['category'];

// 查询数据库，返回该类别下的商品列表
$sql = "SELECT * FROM goods WHERE category = $category";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    // 处理每个商品信息的显示
    echo $row['name'] . ' - ' . $row['price'] . ' - ' . $row['location'] . '
';
}

3. Price filtering function implementation

// 接收用户设置的价格范围
$minPrice = $_GET['minPrice'];
$maxPrice = $_GET['maxPrice'];

// 查询数据库，返回价格在该范围内的商品列表
$sql = "SELECT * FROM goods WHERE price >= $minPrice AND price <= $maxPrice";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    // 处理每个商品信息的显示
    echo $row['name'] . ' - ' . $row['price'] . ' - ' . $row['location'] . '
';
}

4. Regional filtering function implementation

// 接收用户选择的地区
$location = $_GET['location'];

// 查询数据库，返回该地区内的商品列表
$sql = "SELECT * FROM goods WHERE location = '$location'";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    // 处理每个商品信息的显示
    echo $row['name'] . ' - ' . $row['price'] . ' - ' . $row['location'] . '
';
}

5. Multi-condition combination filtering function implementation

// 获取用户输入的各个筛选条件
$keyword = $_GET['keyword'];
$category = $_GET['category'];
$minPrice = $_GET['minPrice'];
$maxPrice = $_GET['maxPrice'];
$location = $_GET['location'];

// 根据用户的选择，构建查询语句
$sql = "SELECT * FROM goods WHERE name LIKE '%$keyword%' AND category = $category AND price >= $minPrice AND price <= $maxPrice AND location = '$location'";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    // 处理每个商品信息的显示
    echo $row['name'] . ' - ' . $row['price'] . ' - ' . $row['location'] . '
';
}

In the above example code, use The MySQLi extension is used to connect to the database and perform query operations, which needs to be modified appropriately according to the specific situation.

4. Summary

Through the above examples, we can see how to use PHP to develop a second-hand recycling website with precise search functions. Users can filter based on keywords, categories, price ranges, regions and other conditions, and get a list of qualified second-hand products. Of course, in actual projects, we can also expand functions as needed, such as adding paging functions, sorting functions, etc., to improve user experience. I hope this article will be helpful in developing a search function for second-hand recycling websites.

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