编辑config/web.php
首先log要开启
'bootstrap' => [
'log'
],[file]
'components' => [
'log' => [
'targets' => [
[
'class' => 'yii\log\FileTarget',
'exportInterval' => 1,
],
],
],默认输出到runtime/logs/app.log
注意webserver或控制台用户要有写入该文件的权限
[database]
'log' => [
'targets' => [
[
'class' => 'yii\log\DbTarget',
'levels' => ['error', 'warning', 'trace'],
]
]
],默认输出db组件对应的数据库下{{%log}}表
yii2根目录下运行下面命令生成对应的table schema
./yii migrate --migrationPath=@yii/log/migrations/
注意config/console.php下也要有和web.php同样的配置，否则命令执行不成功。
还可以根据不同的环境配置不同的日志模式
'components' => [
'log' => [
'traceLevel' => YII_ENV == 'dev' ? 3 : 0,
'targets' => [
[
'class' => 'yii\log\DbTarget',
'levels' => YII_DEBUG ? ['error', 'warning', 'trace'] : ['error'],
],
[
'class' => 'yii\log\FileTarget',
'levels' => YII_DEBUG ? ['error', 'warning', 'trace'] : ['error', 'warning'],
],
],
],
], 
