yii框架入口文件在哪里

<?php defined(&#39;YII_DEBUG&#39;) or define(&#39;YII_DEBUG&#39;, true); defined(&#39;YII_ENV&#39;) or define(&#39;YII_ENV&#39;, &#39;dev&#39;);  require(__DIR__ . &#39;/../../vendor/autoload.php&#39;); require(__DIR__ . &#39;/../../vendor/yiisoft/yii2/Yii.php&#39;); require(__DIR__ . &#39;/../../common/config/bootstrap.php&#39;); require(__DIR__ . &#39;/../config/bootstrap.php&#39;);  $config = yiihelpersArrayHelper::merge(     require(__DIR__ . &#39;/../../common/config/main.php&#39;),     require(__DIR__ . &#39;/../../common/config/main-local.php&#39;),     require(__DIR__ . &#39;/../config/main.php&#39;),     require(__DIR__ . &#39;/../config/main-local.php&#39;) );  $application = new yiiwebApplication($config); $application->run();