Yii2输出日志到log文件

// main.php的components中添加
// 配置SQL语句输出
'log' => [
  'targets' => [
    [
      'class' => 'yii\log\FileTarget',
      'levels' => ['error', 'warning', 'info'],
      'categories' => ['yii\db\*', 'app\models\*'],
      'logFile' => '@runtime/logs/sql.log',
    ],
    'db' => [ 'class' => 'yii\log\FileTarget'],
  ],
],