How to use PHP and Xunsearch to classify and filter search results

How to use PHP and Xunsearch to classify and filter search results

Search engines play an increasingly important role in modern network applications and can help users find the information they need quickly and accurately. How to classify and filter search results is the key to improving the search experience. In this article, I will introduce how to use PHP and Xunsearch to classify and filter search results, and attach code examples.

1. Introduction to Xunsearch
Xunsearch is an open source full-text search engine. It is developed based on C and provides PHP extensions. It has the characteristics of high performance, high stability and high availability. It supports search and retrieval in multiple languages, as well as indexing and querying of custom data fields. Before using Xunsearch, you need to install and configure the Xunsearch server.

2. Implement search result classification

1. Get keywords
   Get the search keywords entered by the user through PHP’s $_GET or $_POST method, for example:

$keyword = $_GET['keyword'];

2. Connect to the Xunsearch server
   Use the XSwire class provided by Xunsearch to connect to the Xunsearch server, as shown below:

$xs = new XS('demo');    // 连接到名为demo的Xunsearch项目

3. Create a search object
   Use the connection A good Xunsearch server creates a Xunsearch search object, for example:

$search = $xs->search;

4. Perform search
   Use the search object to search, you need to specify the search fields and search keywords, as follows:

$search->setQuery($keyword);
$search->setLimit(10);    // 指定返回的搜索结果数量
$result = $search->search();

5. Category search results
   Category search results based on requirements and business logic. You can classify according to the value of the field or other conditions, for example:

$categories = array();
foreach ($result as $document) {
    $category = $document->category;
    if (!isset($categories[$category])) {
        $categories[$category] = array();
    }
    $categories[$category][] = $document;
}

6. Display classification results
   According to the classification results, the search results are displayed according to classification:

foreach ($categories as $category => $documents) {
    echo '<h2>'.$category.'</h2>';
    foreach ($documents as $document) {
        // 显示搜索结果
        echo '<p>'.$document->title.'</p>';
    }
}

3. Implement search result filtering

1. Set filter conditions
   Before executing the search, you can set filter conditions to filter the search results. For example, only display search results under a certain category:

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