How to use PHP and Xunsearch to implement geographical location search function

How to use PHP and Xunsearch to implement the geographical location search function

Overview:
Geolocation search is one of the common requirements in modern web applications. It can help users quickly find nearby businesses and attractions. or other location information. In this article, we will introduce how to use PHP and Xunsearch to implement geolocation search functionality. Xunsearch is a Chinese full-text search solution based on an open source search engine. It is efficient, fast and flexible.

Step 1: Install Xunsearch
First, we need to install Xunsearch on the server. You can download the latest version of the installation package from the official website of Xunsearch and follow the official documentation for installation steps. After the installation is complete, remember to start the Xunsearch service.

Step 2: Prepare geographical location data
Next, we need to prepare geographical location data. In this example, assume we have a data table called "location" that contains the name, longitude, and latitude information of the business. We can create this data table using the following SQL statement:

CREATE TABLE location (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(255) NOT NULL,
  longitude DOUBLE NOT NULL,
  latitude DOUBLE NOT NULL
);

Then insert some sample data into the "location" table, for example:

INSERT INTO location (name, longitude, latitude) VALUES
('商家1', 121.47856, 31.23542),
('商家2', 121.52142, 31.22584),
('商家3', 121.51993, 31.15673),
('商家4', 121.45218, 31.24736),
('商家5', 121.52306, 31.19175);

Step 3: Create a Xunsearch index
Next , we need to use Xunsearch's API to create the index. Introduce the Xunsearch library file into the PHP code, and then create a Xunsearch object. Then, create an index for the "location" table and specify the columns that need to be used as search fields. The code example is as follows:

<?php
// 引入Xunsearch的库文件
require_once '/path/to/xunsearch/sdk/php/lib/XS.php';

// 创建Xunsearch对象
$xs = new XS('location');

// 获取“location”表的索引对象
$index = $xs->index;

// 创建索引
$index->beginRebuild();

// 指定需要作为搜索字段的列
$index->setDB($xs->db->getDb('location'));
$index->setScheme(new XSFieldScheme([
  'name' => 'string',
  'longitude' => 'numeric',
  'latitude' => 'numeric'
]));

// 结束创建索引
$index->endRebuild();

Step 4: Implement the geographical location search interface
Now, we can implement a simple PHP script to handle geolocation search requests. First, get the longitude and latitude parameters provided by the user. Xunsearch's search capabilities can then be leveraged to perform geolocation searches and return search results. The code example is as follows:

<?php
// 引入Xunsearch的库文件
require_once '/path/to/xunsearch/sdk/php/lib/XS.php';

// 获取用户提供的经度和纬度
$longitude = $_GET['longitude'];
$latitude = $_GET['latitude'];

// 创建Xunsearch对象
$xs = new XS('location');

// 获取搜索对象
$search = $xs->search;

// 设置搜索关键字
$search->setFuzzy(true);
$search->setQuery("longitude:$longitude AND latitude:$latitude");

// 执行搜索
$result = $search->search();

// 输出搜索结果
foreach ($result as $item) {
  echo $item->name . '<br>';
}

Usage example:
Now we can test our geolocation search functionality by accessing the following URL:

http://example.com/search.php?longitude=121.50000&latitude=31.20000

This will return the closest location to the provided latitude and longitude the shop's name.

Conclusion:
This article introduces how to use PHP and Xunsearch to implement the geographical location search function. First, install Xunsearch and prepare geolocation data. Then, use Xunsearch's API to create the index. Finally, implement the geolocation search interface and perform searches by using Xunsearch's search function. By following these steps, you can add powerful geolocation search capabilities to your web applications.

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