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#### 数据库切换 * 切换数据库(一) ~~~ $result = Db::connect('mysql:root:123456@127.0.0.1:3306/testA#utf8')->query('select * from user where age=18'); dump($result); ~~~ * 切换数据库(二) ~~~ $result = Db::connect([ 'type'=>'mysql', 'hostname'=>'127.0.0.1', 'database'=>'test', 'username'=>'root', 'password'=>'123456', 'hostport'=>'3306', 'params'=>[], 'charset'=>'utf8', 'prefix'=>'', ] ) ~~~ * 切换数据库(三) ~~~ application/config.php $db1 = [ 'type'=>'mysql', 'hostname'=>'127.0.0.1', 'database'=>'testA', 'username'=>'root', 'password'=>'123456', 'hostport'=>'3306', 'params'=>[], 'charset'=>'utf8', 'prefix'=>'', ], $db2 = [ 'type'=>'mysql', 'hostname'=>'127.0.0.1', 'database'=>'testB', 'username'=>'root', 'password'=>'123456', 'hostport'=>'3306', 'params'=>[], 'charset'=>'utf8', 'prefix'=>'', ], Db::connect('db1')->query('select * from user where age=25'); ~~~