Development guide for legal document search tool built with PHP and coreseek

Legal document search tool development guide built with PHP and coreseek

Introduction:
In today's era of information explosion, people's needs for legal documents have become more and more diverse and urgent. In order to meet people's need to quickly search legal documents, this article introduces how to use PHP and coreseek technology to build an efficient and accurate legal document search tool.

1. Overview
1.1 PHP
PHP is a general open source scripting language, especially suitable for web development. PHP syntax is simple and easy to learn, supports many databases, and provides rich library functions. Applications written in PHP can interact with various databases and generate dynamic web content.

1.2 coreseek
coreseek is a full-text search service software based on the Sphinx open source search engine. It enables fast and accurate full-text search and supports distributed search, customized search strategies and multi-language search.

2. Environment setup
2.1 Install PHP
Before building the legal document search tool, you first need to set up a PHP environment. You can download the PHP installation package and then install it according to the installation guide.

2.2 Install coreseek
Next, we need to install coreseek. You can install it through the following steps:
1) Download the Sphinx installation package and extract it to the specified directory;
2) Enter the Sphinx directory and execute the "./configure" command to generate the Makefile;
3) Execute "make" Compile and install with the "make install" command;
4) Unzip the coreseek installation package and copy it to the "source code" folder in the Sphinx directory;
5) Enter the source code folder and execute "sh buildconf .sh" command to generate the configuration file;
6) Execute the "./configure --prefix=/usr/local/coreseek" command to generate the Makefile;
7) Execute the "make" and "make install" commands to compile and installation.

2.3 Configuring coreseek
After the installation is completed, coreseek needs to be configured. You can configure it through the following steps:
1) Enter the coreseek installation directory and find the conf folder;
2) Modify the sphinx.conf file under the conf folder and configure index and search properties, such as defining index fields, Weight, etc.;
3) Execute "./bin/indexer -c conf/sphinx.conf --all" command to generate index;
4) Execute "./bin/searchd -c conf/sphinx.conf" command to start the search service.

3. Develop search tools
3.1 Create database table
First, we need to create a table in the database to store relevant information of legal documents, such as document ID, title, content, etc. It can be created through the following SQL statement:

CREATE TABLE `documents` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL,
  `content` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

3.2 Insert legal document data
Next, we need to insert some legal document data into the database for search. It can be inserted through the following PHP code example:

<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO documents (title, content) VALUES ('Document 1', 'This is document 1.')";
$conn->query($sql);

$sql = "INSERT INTO documents (title, content) VALUES ('Document 2', 'This is document 2.')";
$conn->query($sql);

$sql = "INSERT INTO documents (title, content) VALUES ('Document 3', 'This is document 3.')";
$conn->query($sql);

$conn->close();
?>

3.3 Writing a search page
Finally, we need to write a search page to receive the keywords entered by the user and then query the relevant legal documents through the search engine . It can be written through the following PHP code examples:

<?php
require('path/to/SphinxClient.php');

$cl = new SphinxClient();
$cl->SetServer('localhost', 9312);
$cl->SetMatchMode(SPH_MATCH_EXTENDED2);

$keyword = isset($_GET['keyword']) ? $_GET['keyword'] : '';

$result = $cl->Query($keyword, 'documents');

if ($result === false) {
    echo "搜索失败: " . $cl->GetLastError();
} else {
    echo "检索到 " . $result['total'] . " 条结果：<br>";
    
    foreach ($result['matches'] as $match) {
        echo "<a href='document.php?id=" . $match['id'] . "'>" . $match['attrs']['title'] . "</a><br>";
    }
}
?>

IV. Summary
Through the introduction of this article, we have learned how to use PHP and coreseek technology to build a legal document search tool. In actual development, developers can further improve functions according to actual needs, such as adding search filter conditions, paging search results, etc. I believe that the guidelines in this article can provide some help to developers and make search tools more efficient and accurate in meeting user needs.

The above is the detailed content of Development guide for legal document search tool built with PHP and coreseek. For more information, please follow other related articles on the PHP Chinese website!