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Implementing Efficient Real-Time Search and Automatic Index Update with PHP and Xunsearch

M66 2025-06-21

Introduction:

When developing websites or applications, the search functionality is a critical component. However, traditional database search methods often suffer from low efficiency and fail to meet real-time search demands. Xunsearch, a powerful full-text search engine, is particularly suitable for solving these problems. It supports Chinese word segmentation and offers fast search capabilities. This article will demonstrate how to combine PHP with Xunsearch to implement real-time search and automatic index updates.

1. Environment Setup

Before we begin, you need to set up the following environment:

  • PHP environment (version 5.4 or higher)

  • Xunsearch search engine server (download and install it)

2. Installing Xunsearch

1. Extract the downloaded Xunsearch server package. 2. Navigate to the server directory and run the `./xunsearchd` command to start the Xunsearch server.

3. Setting Up Indexes and Search Example

First, create a PHP file named `search.php`.

Include Xunsearch Library:

require_once '/path/to/sdk/php/lib/XS.php';

Create Xunsearch Object and Specify the Index Path:

$xs = new XS('/path/to/xunsearch/app.ini');

Create Search Object and Set the Fields to be Searched:

$search = $xs->search;
$search->setFuzzy();
$search->setLimit(10);
$search->setScwsMulti(3);
$search->addWeight('title', 10);
$search->addWeight('content', 5);

Start Searching:

$keyword = $_GET['q'];
$result = $search->search($keyword);

Loop Through the Search Results:

foreach ($result as $item) {
    echo $item->title . '<br>';
    echo $item->content . '<br><br>';
}

4. Automatic Index Update

Create a PHP file named `update.php`.

Include Xunsearch Library:

require_once '/path/to/sdk/php/lib/XS.php';

Create Xunsearch Object and Specify the Index Path:

$xs = new XS('/path/to/xunsearch/app.ini');

Create Index Object:

$index = $xs->index;

Fetch the Data to be Updated (example using MySQL database):

$pdo = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $pdo->prepare('SELECT * FROM articles');
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);

Loop Through and Update the Index:

foreach ($data as $item) {
    $doc = new XSDocument();
    $doc->setFields($item);
    $index->update($doc);
}

Save and Close the Index:

$index->flushIndex();

Conclusion:

By following this guide, you have learned how to implement efficient real-time search functionality using PHP and Xunsearch, along with automatic index updating to ensure timely and accurate search results. With the powerful capabilities of Xunsearch, you can quickly integrate and optimize the search experience on your website or application.
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