Where is the thinkphp database connection file?

ThinkPHP is a development framework that provides tools and environments that facilitate development. Among them, the database connection file is a very critical configuration file, which is used to connect to the database and perform database operations.

In the ThinkPHP framework, the database connection file is usually stored in /config/database.php. This file mainly contains the configuration information required for database connection, such as database server address, database name, database user name, database password, etc. These configuration information will be used during the actual database connection process.

The following is a simple database.php file example:

<?php

return [
    // 默认使用的数据库连接配置
    &#39;default&#39; => env('database.driver', 'mysql'),
    // 数据库连接配置信息
    'connections' => [
        'mysql' => [
            // 数据库类型
            'type'        => 'mysql',
            // 服务器地址
            'hostname'    => 'localhost',
            // 数据库名
            'database'    => 'thinkphp',
            // 数据库用户名
            'username'    => 'root',
            // 数据库密码
            'password'    => '',
            // 数据库连接端口
            'hostport'    => '',
            // 数据库连接参数
            'params'      => [],
            // 数据库编码默认采用utf8
            'charset'     => 'utf8',
            // 数据库表前缀
            'prefix'      => 'think_',
            // 数据库调试模式
            'debug'       => true,
            // 数据库部署方式:0 集中式(单一服务器),1 分布式(主从服务器)
            'deploy'      => 0,
            // 数据库读写是否分离 主从式有效
            'rw_separate' => false,
            // 读写分离后 主服务器数量
            'master_num'  => 1,
            // 指定从服务器序号
            'slave_no'    => '',
            // 是否严格检查字段是否存在
            'fields_strict' => false,
            // 数据集返回类型 array 数组 collection Collection对象
            'resultset_type' => 'collection',
            // 自动写入时间戳字段
            'auto_timestamp' => false,
            // 时间字段取出后的默认时间格式
            'datetime_format' => 'Y-m-d H:i:s',
            // 是否需要进行SQL性能分析
            'sql_explain' => false,
        ],
    ],
];

In the above example, the 'connections' array is the main configuration item, in which multiple different database connections can be configured. Each connection can specify different servers, user names, passwords and other information. The default connection used is 'mysql', you can also change the default connection by modifying 'default'.

When we need to access the database, we can use the DB class provided by the framework to operate. For example, the code to obtain all user information in the controller is as follows:

<?php

namespace app\index\controller;

use think\Db;

class UserController
{
    public function index()
    {
        // 获取所有用户信息
        $users = Db::name(&#39;user&#39;)->select();
        // 返回用户列表视图
        return view('user/list', ['users' => $users]);
    }
}

In the above code, the Db class provides some convenient methods to complete database operations, such as the 'name' method for specifying the table name, ' The select' method is used to query data.

In short, the database connection file is a very important configuration file when using the ThinkPHP framework. By studying and practicing the materials, we can easily master their usage and improve development efficiency.

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