How to catch yii2 exceptions

How to catch exceptions in yii2

All exceptions in yii are inherited from Exception. There are two ways to write exceptions

//a文件: 
function a() {
  throw new \yii\web\HttpException('我是数据库异常');
}
 
//b文件:
use yii\db\Exception;

Writing method one:

try{
  a();
}
catch(\yii\web\HttpException $e)
{
  echo "捕获到异常了";
}

Writing method two:

try{
  a();
}
catch(\Exception $e)
{
  echo "捕获到异常了";
}

Recommended related article tutorials: yii tutorial

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