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

Second-hand recycling website uses the rapid search function developed by PHP

With the increasingly popular second-hand commodity transactions, second-hand recycling websites have become the main place for more and more people to visit Taobao and for rookies to go green consumption. In order to improve user experience and provide more efficient search services, many second-hand recycling websites have begun to use PHP to develop rapid search functions. This function can quickly retrieve the second-hand product information that users need. This article will introduce you to how to use PHP to develop rapid search functions and provide relevant code examples.

PHP is a scripting language widely used in Web development. It is particularly suitable for processing dynamic content on the Web. In second-hand recycling websites, PHP is widely used to process search requests submitted by users and retrieve corresponding product information from the database. The following is a simple PHP code example that shows how to implement a rapid search function in a second-hand recycling website:

<?php
//连接数据库
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "secondhandmarket";

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

//获取用户输入的搜索关键词
$keyword = $_GET['keyword'];

//构建查询语句
$sql = "SELECT * FROM products WHERE name LIKE '%" . $keyword . "%'";

//执行查询语句
$result = $conn->query($sql);

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

//关闭数据库连接
$conn->close();
?>

The above code first connects to the database, then obtains the search keywords entered by the user, and constructs a SQL query statement . Next, query the database and output the search results. If relevant product information is found, the ID, name and price of the product are output one by one. If no relevant product is found, a prompt message will be output.

In order to increase the speed of search, we can add some indexes to the database. Indexes are special structures built into database tables that speed up data searches and queries. In the database of the second-hand recycling website, a full-text index can be added to the product name column. In this way, when performing a search operation, the database engine can quickly locate products that match the search keywords.

To use a full-text index, you can add an index on the "name" column of the product table. The following is a sample SQL statement:

ALTER TABLE products ADD FULLTEXT INDEX fulltext_name (name);

In this example, we added a full-text index named "fulltext_name" on the "name" column in the table named "products". This index will be bound to the "name" column for use in searches.

There are many areas that can be optimized in the implementation of the rapid search function, such as using caching technology, optimizing SQL query statements, etc. However, through the above PHP code example and the addition of the index, we can already implement a simple but efficient quick search function in the second-hand recycling website.

When developing a second-hand recycling website, we should choose appropriate technologies and tools based on actual needs. PHP is a scripting language well-suited for handling dynamic content on the Web, and it is a technology utilized by many second-hand recycling websites. By using PHP to develop rapid search functions, we can provide users with a better search experience, thereby attracting more users and promoting the prosperity of second-hand commodity transactions.

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