下面这些别名都是在Yii2里面系统定义的，可以直接拿来就用
- '@yii' =>
- '@yii/swiftmailer' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-swiftmailer' (length=52)
- '@yii/gii' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-gii' (length=44)
- '@yii/faker' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-faker' (length=46)
- '@yii/debug' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-debug' (length=46)
- '@yii/codeception' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-codeception' (length=52)
- '@yii/bootstrap' => string 'C:wampwwwadvancedvendor/yiisoft/yii2-bootstrap' (length=50)
- '@yii' => string 'C:wampwwwadvancedvendoryiisoftyii2' (length=40)
- '@app' => string 'C:wampwwwadvancedfrontend' (length=29)
- '@vendor' => string 'C:wampwwwadvanced/vendor' (length=27)
- '@bower' => string 'C:wampwwwadvanced/vendorower' (length=33)
- '@npm' => string 'C:wampwwwadvanced/vendor pm' (length=31)
- '@runtime' => string 'C:wampwwwadvancedfrontend untime' (length=37)
- '@webroot' => string 'C:/wamp/www/advanced/frontend/web' (length=33)
- '@web' => string '/advanced/frontend/web' (length=22)
其中最常用的别名有
- @app
- @vendor
- @runtime
- @webroot
- @web
而且可以看到除了@web别名是url外，其它的都是物理路径
http://yiifans.com/forum.php?mod=viewthread&tid=9578&extra=