'db_type' =>'Oracle',
'db_host' =>'*********',
'db_name' =>'ORA61',
'db_user' =>'username',
'db_pwd' =>'pwd',
'db_port' => '1521',
'db_params' => array(
'persist' => true, //注意，这一个必须写
),
'db_charset' => 'ZHS16GBK'

报错提示：

这个问题该怎么解决啊？谁帮帮忙