How to use PHP and Xunsearch to implement intelligent sorting and filtering of search results

How to use PHP and Xunsearch to achieve intelligent sorting and filtering of search results

Search engines play a vital role in modern Internet applications. They can help users quickly find what they want from a large amount of data. required content. For large websites, intelligent sorting and filtering of search results are indispensable functions, which can help users obtain the results they need more accurately. This article will introduce how to use PHP and Xunsearch search engine library to achieve intelligent sorting and filtering of search results.

1. Installation and configuration Xunsearch

Xunsearch is a powerful full-text search engine library based on Chinese word segmentation. It integrates rich search functions and has high performance and scalability. First, you need to install Xunsearch, which you can do through the following steps:

1. Download the installation package from the Xunsearch official website and extract it to the appropriate directory.
2. Run the install.sh script to install and follow the prompts to complete the installation process.
3. Modify the sdk/php/app/demo.ini configuration file and set the database connection method and index saving path.

2. Index building

Building index is a key step for search engines. It allows search engines to quickly find the required content from large amounts of data. The following is a sample code for establishing a Xunsearch index:

<?php
require_once('/path/to/XS.php');

$xs = new XS('demo'); // 连接到名为 demo 的搜索服务
$index = $xs->index; // 获取索引对象

$index->clean(); // 清空原有索引
$index->beginRebuild(); // 开始重建索引

// 从数据库中获取需要建立索引的数据
$pdo = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
$stmt = $pdo->query('SELECT * FROM articles');
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    $doc = new XSDocument();
    $doc->setFields($row);
    $index->add($doc); // 将文档添加到索引中
}

$index->endRebuild(); // 结束重建索引

3. Intelligent sorting of search results

Search engines need to sort search results in order to display the most relevant content to users. Xunsearch provides a variety of sorting algorithms, including the default TF-IDF sorting, sorting by relevance, sorting by time, etc. The following is a sample code for sorting according to relevance:

<?php
require_once('/path/to/XS.php');

$xs = new XS('demo'); // 连接到名为 demo 的搜索服务
$search = $xs->search; // 获取搜索对象
$search->setFuzzy(true); // 启用模糊搜索

$query = 'PHP语言'; // 用户的搜索关键词
$search->setQuery($query); // 设置搜索关键词

$search->setLimit(10); // 设置每页显示的结果数量
$search->setSort('relevance'); // 设置按相关度排序

$docs = $search->search(); // 执行搜索并获取结果

foreach ($docs as $doc) {
    echo $doc->title . "<br>";
    echo $doc->content . "<br>";
}

4. Filtering of search results

In addition to sorting, search engines also need to provide filtering functions so that users can obtain the desired results more accurately. result. Xunsearch provides a variety of methods for setting filter conditions, such as setting the range of a certain field, setting multi-value filtering for multiple fields, etc. The following is a sample code for setting field range filtering:

<?php
require_once('/path/to/XS.php');

$xs = new XS('demo'); // 连接到名为 demo 的搜索服务
$search = $xs->search; // 获取搜索对象

$search->setFuzzy(true); // 启用模糊搜索
$search->setLimit(10); // 设置每页显示的结果数量

$query = 'PHP语言'; // 用户的搜索关键词
$search->setQuery($query); // 设置搜索关键词

// 设置字段范围筛选
$search->addRange('publish_time', '2019-01-01 00:00:00', '2020-01-01 23:59:59');

$docs = $search->search(); // 执行搜索并获取结果

foreach ($docs as $doc) {
    echo $doc->title . "<br>";
    echo $doc->content . "<br>";
}

Through the above code example, we can see how to use PHP and Xunsearch to implement intelligent sorting and filtering of search results. Such functions can effectively improve the user experience and make it easier for users to quickly find the content they need. Of course, Xunsearch also supports more search functions and can be adjusted and expanded according to specific needs.

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