Laravel框架，同时连接2个数据库

在env内，写入两个数据库的信息

#默认连接DB_CONNECTION=mysqlDB_HOST=localhost    //连接地址DB_PORT=3306DB_DATABASE=database //数据库名称DB_USERNAME=admin    //数据库账号DB_PASSWORD=admin    //数据库密码#第二个数据库连接DB_HOST_GH=192.168.1.1  //第二个数据库的连接地址DB_PORT_GH=3306DB_DATABASE_GH=database2   //数据库名称DB_USERNAME_GH=admin2      //数据库账号DB_PASSWORD_GH=admin2      //数据库密码

在config文件夹内，找到database.php，在connections内加入代码信息

'connections' => [        'sqlite' => [            'driver' => 'sqlite',            'database' => env('DB_DATABASE', database_path('database.sqlite')),            'prefix' => '',        ],        //第一个数据库连接        'mysql' => [            'driver' => 'mysql',            'host' => env('DB_HOST', '127.0.0.1'),            'port' => env('DB_PORT', '3306'),            'database' => env('DB_DATABASE', 'forge'),            'username' => env('DB_USERNAME', 'forge'),            'password' => env('DB_PASSWORD', ''),            'unix_socket' => env('DB_SOCKET', ''),            'charset' => 'utf8mb4',            'collation' => 'utf8mb4_unicode_ci',            'prefix' => 'his_',            'strict' => false,            'engine' => null,        ],        //第二个数据库连接        'mysql_gh' => [            'driver' => 'mysql',            'host' => env('DB_HOST_GH','192.168.1.1'),            'port' => env('DB_PORT_GH', '3306'),            'database' => env('DB_DATABASE_GH', 'forge'),            'username' => env('DB_USERNAME_GH', 'forge'),            'password' => env('DB_PASSWORD_GH', ''),            'charset' => 'utf8mb4',            'collation' => 'utf8mb4_unicode_ci',            'prefix' => '',            'strict' => false,            'engine' => null,        ]    ],

controller使用数据库连接时，代码实例：

$res = DB::connection('mysql_gh');//连接第二个数据库$data = $res->select("SELECT * FROM user WHERE username='张三'");或者$data = DB::connection('mysql_gh')->select("SELECT * FROM user WHERE username='张三'");

来源地址：https://blog.csdn.net/hdxyzlh_0225/article/details/127846894