console出错 [ 2.0 版本 ]

命令行运行php /home/www/test/yii test/test报错：

Exception 'yii\db\Exception' with message 'could not find driver'

in /home/liuyuan/www/woker-platform/vendor/yiisoft/yii2/db/Connection.php:568

Stack trace:
#0 /home/liuyuan/www/woker-platform/vendor/yiisoft/yii2/db/Connection.php(896): yii\db\Connection->open()
#1 /home/liuyuan/www/woker-platform/vendor/yiisoft/yii2/db/Connection.php(883): yii\db\Connection->getMasterPdo()

说是没开扩展，可是我backend里查询数据完全没问题啊