How to use PHP and Xunsearch to implement real-time search and automatically update indexes

How to use PHP and Xunsearch to implement real-time search and automatically update indexes

Introduction:
When developing a website or application, the search function is a vital component. Traditional database search methods have efficiency problems and cannot meet real-time needs. Xunsearch is a full-text search engine written in C that supports Chinese word segmentation and fast search. This article will introduce how to use PHP and Xunsearch to implement real-time search and automatically update the index.

1. Environment preparation
Before starting, we need to prepare the following environment:

1. PHP environment (version 5.4 or above)
2. Xunsearch server (download address : http://www.xunsearch.com/download)

2. Install Xunsearch

1. Unzip the downloaded Xunsearch server compressed package.
2. Enter the server directory and run ./xunsearchd to start the Xunsearch server.

3. Set index and search example

1. Create a PHP file and name it search.php.

2. Introducing the Xunsearch class library:

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

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3. Create a Xunsearch object and specify the path to the index:

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

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4. Create an index object and specify the fields to be searched:

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

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5. Start the search:

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

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6. Loop and output the search results:

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

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4. Automatically update the index

1. Create a PHP file and name it update.php.

2. Introducing the Xunsearch class library:

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

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3. Create a Xunsearch object and specify the path to the index:

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

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4. Create index object:

   $index = $xs->index;

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5. Get the data that needs to be updated (MySQL database is used in the example):

   $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);

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6. Cycle update index:

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

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7. Save and close the index:

   $index->flushIndex();

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Conclusion:
This article introduces how to use PHP and Xunsearch to implement real-time search and automatically update the index. By using the powerful features provided by Xunsearch, we can easily add efficient real-time search capabilities to our website or application. At the same time, by automatically updating the index, you can ensure that search results are updated in a timely manner. I hope this article can be helpful to you, thank you for reading!

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