How to modify all database connections in thinkphp

Preface

When using PHP to develop web applications, database connection is a basic issue, especially when your application needs to connect to multiple databases. ThinkPHP is an excellent PHP framework that provides a simple way to configure and manage database connections. In this article, we will explain how to modify all database connections using ThinkPHP.

Step 1: Edit the configuration file

Idea: Modify or add the database connection information in the configuration file config.php of the ThinkPHP application.

Steps:

1. Open the config.php file
2. Find the $config variable, which is an array that stores all application configuration information
3. Look for 'DB_CONFIG' in the array. This is a default database configuration information. You can modify it to connect to the database you need, as shown below:

'DB_CONFIG' => [
    'type'     => 'mysql',
    'hostname' => 'localhost',
    'database' => 'thinkphp',
    'username' => 'root',
    'password' => '',
    'hostport' => '',
    'charset'  => 'utf8mb4',
],

4. If you If you need to connect to multiple databases, you can add multiple configuration information. Note that you need to configure each database with a unique identifier (such as 'DB_CONFIG_1', 'DB_CONFIG_2', etc.) and add them to the $config variable.

Step 2: Modify the database connection

Idea: Where you need to connect to the database, use the information in the configuration file to create a database connection.

Steps:

1. Open the PHP file that needs to be connected to the database
2. Find the code for the database connection, as shown below:

use think\Db;

// 获取一个数据库连接
$db = Db::table('think_users');

// 执行查询操作
$result = $db->where('id', 1)->find();

3. Below this code, create a new database connection using the information in the configuration file as follows:

use think\Db;

// 修改数据库连接信息
$dbConfig = config('DB_CONFIG'); // 或者 config('DB_CONFIG_1')

// 创建一个新的数据库连接
$db = Db::connect($dbConfig); // 或者 Db::connect('db_config_1')

// 执行查询操作
$result = $db->where('id', 1)->find();

Note:

• If you already Once connected to the database, you can use the Db::clear() method to clear all connections, and then use the Db::connect() method to reconnect.
• If you need to share the same database connection information among different applications, you can add the configuration information to the application's public configuration file (such as common.php).

End

In this article, we introduced how to use ThinkPHP to modify all database connections. Using this approach, you can easily manage multiple database connections and easily connect to any database you need to connect to. If you have any questions or suggestions, please feel free to contact us.

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