继续了解Application.
/**
* Registers the errorHandler component as a PHP error handler.
* 注册errorHandler组件作为PHP错误处理函数
* @param array $config application config 应用程序配置
*/
protected function registerErrorHandler(&$config)
{
if (YII_ENABLE_ERROR_HANDLER) {// YII_ENABLE_ERROR_HANDLER在BaseYii中被定义为true
if (!isset($config['components']['errorHandler']['class'])) {
//$config['components']['errorHandler']['class']不存在结束运行
echo "Error: no errorHandler component is configured.\n";
exit();
}
//将$config['components']['errorHandler']的内容设置到了$this->_definitions['errorHandler']中
$this->set('errorHandler', $config['components']['errorHandler']);
unset($config['components']['errorHandler']);// 删除掉配置内容
$this->getErrorHandler()->register();
}
} /**
* Returns an ID that uniquely identifies this module among all modules within the current application.
* Since this is an application instance, it will always return an empty string.
* 返回在当前应用程序中该模块的唯一标识。这是一个应用实例，它将返回一个空字符串。
* @return string the unique ID of the module.模块的唯一标识。
*/
public function getUniqueId()
{
return '';
} /**
* Sets the root directory of the application and the @app alias.设置应用程序的根目录 @ 加应用程序别名。
* This method can only be invoked at the beginning of the constructor.只能在构造函数开始时调用该方法
* @param string $path the root directory of the application.应用程序的根目录。
* @property string the root directory of the application. 应用程序的根目录。
* @throws InvalidParamException if the directory does not exist. 如果目录不存在。抛出异常
*/
public function setBasePath($path)
{
parent::setBasePath($path);
// 使用@app来记录basePath
Yii::setAlias('@app', $this->getBasePath());
} /**
* Runs the application. 运行应用程序。
* This is the main entrance of an application. 应用程序的主要入口。
* @return integer the exit status (0 means normal, non-zero values mean abnormal) 状态（0正常，非0为不正常）
*/
public function run()
{
try { $this->state = self::STATE_BEFORE_REQUEST;
$this->trigger(self::EVENT_BEFORE_REQUEST);//加载事件函数beforRequest函数 $this->state = self::STATE_HANDLING_REQUEST;
$response = $this->handleRequest($this->getRequest());//加载控制器 获取Request对象 $this->state = self::STATE_AFTER_REQUEST;
$this->trigger(self::EVENT_AFTER_REQUEST);//加载afterRequest事件函数 $this->state = self::STATE_SENDING_RESPONSE;
$response->send();//将页面内容输入缓冲，然后输出 $this->state = self::STATE_END; return $response->exitStatus; } catch (ExitException $e) { $this->end($e->statusCode, isset($response) ? $response : null);
return $e->statusCode; }
} /**
* Handles the specified request.
* 处理指定的请求
* This method should return an instance of [[Response]] or its child class
* which represents the handling result of the request.
* 该方法应该返回一个[[Response]]实例，或者它的子类代表处理请求的结果
* @param Request $request the request to be handled 被处理的请求
* @return Response the resulting response 得到的响应
*/
abstract public function handleRequest($request); private $_runtimePath; /**
* Returns the directory that stores runtime files.返回存储运行时文件的路径
* @return string the directory that stores runtime files.存储运行时文件的目录。
* Defaults to the "runtime" subdirectory under [[basePath]].默认返回[[basePath]]下的 "runtime"目录
*/
public function getRuntimePath()
{
if ($this->_runtimePath === null) {//设置临时文件存储路径
$this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . 'runtime');
} return $this->_runtimePath;
} /**
* Sets the directory that stores runtime files.设置存储运行时文件的路径
* @param string $path the directory that stores runtime files.存储运行时文件的目录。
*/
public function setRuntimePath($path)
{
// 获取runtimePath的路径，并存到_runtimePath中
$this->_runtimePath = Yii::getAlias($path);
// 使用@runtime来记录 runtimePath
Yii::setAlias('@runtime', $this->_runtimePath);
} private $_vendorPath; /**
* Returns the directory that stores vendor files.返回插件文件的目录。
* @return string the directory that stores vendor files.
* Defaults to "vendor" directory under [[basePath]].
* 默认返回[[basePath]]下的 "vendor" 目录
*/
public function getVendorPath()
{
if ($this->_vendorPath === null) {
// 不存在，就将其设置为basePath/vendor
$this->setVendorPath($this->getBasePath() . DIRECTORY_SEPARATOR . 'vendor');
} return $this->_vendorPath;
} /**
* Sets the directory that stores vendor files.设置插件目录路径，并设置别名
* @param string $path the directory that stores vendor files.
*/
public function setVendorPath($path)
{
$this->_vendorPath = Yii::getAlias($path);// 获取vendor的路径，并存到_vendorPath中
Yii::setAlias('@vendor', $this->_vendorPath);// 设置@vendor的alias
Yii::setAlias('@bower', $this->_vendorPath . DIRECTORY_SEPARATOR . 'bower');
Yii::setAlias('@npm', $this->_vendorPath . DIRECTORY_SEPARATOR . 'npm');
} /**
* Returns the time zone used by this application.取得时区
* This is a simple wrapper of PHP function date_default_timezone_get().
* If time zone is not configured in php.ini or application config,
* it will be set to UTC by default.
* @return string the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-get.php
*/
public function getTimeZone()
{
return date_default_timezone_get();
} /**
* Sets the time zone used by this application.设置时区
* This is a simple wrapper of PHP function date_default_timezone_set().
* Refer to the [php manual](http://www.php.net/manual/en/timezones.php) for available timezones.
* @param string $value the time zone used by this application.
* @see http://php.net/manual/en/function.date-default-timezone-set.php
*/
public function setTimeZone($value)
{
date_default_timezone_set($value);
} /**
* Returns the database connection component.返回数据库连接组件
* @return \yii\db\Connection the database connection.
*/
public function getDb()
{
return $this->get('db');
} /**
* Returns the log dispatcher component.返回日志调度组件
* @return \yii\log\Dispatcher the log dispatcher application component.
*/
public function getLog()
{
return $this->get('log');
} /**
* Returns the error handler component.返回错误处理组件
* @return \yii\web\ErrorHandler|\yii\console\ErrorHandler the error handler application component.
*/
public function getErrorHandler()
{
return $this->get('errorHandler');
} /**
* Returns the cache component.返回缓存组件
* @return \yii\caching\Cache the cache application component. Null if the component is not enabled.
*/
public function getCache()
{
return $this->get('cache', false);
} /**
* Returns the formatter component.返回格式化程序组件
* @return \yii\i18n\Formatter the formatter application component.
*/
public function getFormatter()
{
return $this->get('formatter');
} /**
* Returns the request component.返回请求的组件对象
* @return \yii\web\Request|\yii\console\Request the request component.
*/
public function getRequest()
{
return $this->get('request');
} /**
* Returns the response component.返回响应组件
* @return \yii\web\Response|\yii\console\Response the response component.
*/
public function getResponse()
{
return $this->get('response');
} /**
* Returns the view object.返回视图对象
* @return View|\yii\web\View the view application component that is used to render various view files.
*/
public function getView()
{
return $this->get('view');
} /**
* Returns the URL manager for this application.返回当前应用的URL管理组件
* @return \yii\web\UrlManager the URL manager for this application.
*/
public function getUrlManager()
{
return $this->get('urlManager');
} /**
* Returns the internationalization (i18n) component返回国际化组件
* @return \yii\i18n\I18N the internationalization application component.
*/
public function getI18n()
{
return $this->get('i18n');
} /**
* Returns the mailer component.返回邮件组件
* @return \yii\mail\MailerInterface the mailer application component.
*/
public function getMailer()
{
return $this->get('mailer');
} /**
* Returns the auth manager for this application.返回该应用的权限管理组件
* @return \yii\rbac\ManagerInterface the auth manager application component.
* Null is returned if auth manager is not configured. 管理权限没有配置返回null
*/
public function getAuthManager()
{
return $this->get('authManager', false);
} /**
* Returns the asset manager.返回资源管理组件
* @return \yii\web\AssetManager the asset manager application component.
*/
public function getAssetManager()
{
return $this->get('assetManager');
} /**
* Returns the security component.返回安全组件
* @return \yii\base\Security the security application component.
*/
public function getSecurity()
{
return $this->get('security');
} /**
* Returns the configuration of core application components.返回核心组件的配置
* @see set()
*/
public function coreComponents()
{
return [
'log' => ['class' => 'yii\log\Dispatcher'],
'view' => ['class' => 'yii\web\View'],
'formatter' => ['class' => 'yii\i18n\Formatter'],
'i18n' => ['class' => 'yii\i18n\I18N'],
'mailer' => ['class' => 'yii\swiftmailer\Mailer'],
'urlManager' => ['class' => 'yii\web\UrlManager'],
'assetManager' => ['class' => 'yii\web\AssetManager'],
'security' => ['class' => 'yii\base\Security'],
];
} /**
* Terminates the application.终止应用程序
* This method replaces the `exit()` function by ensuring the application life cycle is completed
* before terminating the application.该方法代替`exit()` 确认一个应用的生命周期已经结束
* @param integer $status the exit status (value 0 means normal exit while other values mean abnormal exit).
* @param Response $response the response to be sent. If not set, the default application [[response]] component will be used.
* @throws ExitException if the application is in testing mode
*/
public function end($status = , $response = null)
{
if ($this->state === self::STATE_BEFORE_REQUEST || $this->state === self::STATE_HANDLING_REQUEST) {
//判断当前状态为请求前或者处理请求
$this->state = self::STATE_AFTER_REQUEST;//设置应用状态为请求完成后
$this->trigger(self::EVENT_AFTER_REQUEST);
} if ($this->state !== self::STATE_SENDING_RESPONSE && $this->state !== self::STATE_END) {
//如果应用状态不是发送应答和应用结束
$this->state = self::STATE_END;//设置状态为应用结束
$response = $response ? : $this->getResponse();
$response->send();//向客户端发送应答
} if (YII_ENV_TEST) {
throw new ExitException($status);
} else {
exit($status);
}
}
php