This article mainly shares with you the detailed explanation of Yii2.0 execution process, mainly in the form of code, hoping to help everyone.
index.php 2 ---->引入 vendor/auto_load.php 3 auto_load.php 4 ---->引入 ventor/composer/autoload_real.php 5 ---->执行 ComposerAutoloaderInit240f916b39e20bc11bc03e2039805bd4->getLoader 6 autoload_real.php 7 ---->getLoader 8 ---->单例 9 ---->spl_autoload_register(array('ComposerAutoloaderInit240f916b39e20bc11bc03e2039805bd4','loadClassLoader')) 10 ---->self::$loader = new \Composer\Autoload\ClassLoader(); 11 ---->引入 \Composer\Autoload\ClassLoader 12 ---->引入 autoload_namespaces.php 给作为属性 $loader 13 ---->$vendorDir $baseDir 14 ---->引入 autoload_psr4.php 作为属性给 $loader 15 ---->$loader->register(true); 16 ---->spl_autoload_register this,loadClass 17 ---->loadClass ----> findFile 18 ---->引入 autoload_files.php require 19 ---->return $loader 20 index.php 21 ---->初始化了一个$loader (暂时不知道什么用) 22 ---->引入 /vendor/yiisoft/yii2/Yii.php 23 Yii.php 24 ----> 引入 BaseYii.php ,Yii 继承 BaseYii 25 ---->spl_autoload_register(BaseYii,autoload) 26 ---->Yii::$classMap = include(__DIR__ . '/classes.php'); //引入一堆php class地址 27 ---->Yii::$container = new yii\di\Container;//容器 28 29 //继承关系梳理 30 yii\di\Container(容器) -> yii\base\Component(实现 属性,事件,行为 功能的基类) -> Object(实现 属性 功能的基类,含有__construct) 31 yii\web\Application(所有web应用类的基类) -> \yii\base\Application(所有应用的基类,__construct) -> Module(所有模块和应用的基类,含有__construct) -> yii\di\ServiceLocator(服务定位器,包含所有模块和应用) -> yii\base\Component -> Object 32 33 index.php 34 ---->$config 引入 35 (new yii\web\Application($config))->run(); 36 ---->\yii\base\Application __construct() 37 ---->Yii::$app = $this (Application) 38 ---->$this->setInstance($this); 设置当前请求类的实例 (把Application类的对象push进Yii的loadedModules里) 39 ---->$this->preInit($config); 40 ---->$this->_basePath = $_config['basepath'] Yii::aliases[@app] = $_config['basepath'] 41 ---->$this->getVendorPath 设置框架路径 42 ---->setVendorPath Yii::aliases[@vendor] Yii::aliases[@bower] Yii::aliases[@npm] 43 ---->$this->getRuntimePath 同上,设置runtimePath Yii::aliases[@runtime] 44 ---->setTimeZone 设置时区 45 ---->核心组件信息(地址)注入$config log view formatter i18n mailer urlManager assetManager security 46 ---->registerErrorHandler 定义错误处理程序 47 ---->Component::__construct($config); Object中的__construct //这步发生了很多事情 48 ---->Yii::configure($this) 把$config赋给$this作属性 49 50 ? $this->bootstrap 中的值哪来的 ?---->配置文件来的。。。。 51 52 ---->$this->init() 53 ---->$this->bootstrap(); 初始化扩展和执行引导组件。 54 ---->引入@vendor/yiisoft/extensions.php 55 ---->Yii::aliases['xxx'] = 'xxx'; extensions.php中aliase地址 56 <!-- 初始化完成 --> 57 58 ---->\yii\base\Application->run() 59 ---->$this->trigger($name) --- $event = new Event; //$name = beforeRequest 执行 _event[beforeRequest]handler 60 ---->$event->sender = application object 61 $event->name = $name; 62 //这两句没懂 63 $event->data = $handler[1]; 64 call_user_func($handler[0], $event); 65 Event::trigger($this, $name, $event); //$this = application object 66 67 ---->$response = $this->handleRequest($this->getRequest()); 68 ---->$this->getRequest() ---->get('request') get方法位于ServiceLocator ,返回指定id的实例(返回request实例到_components['request']) 69 ---->$this->handleRequest(request对象) //request对象的类是yii/web/request 70 ---->list ($route, $params) = $request->resolve();//解决当前请求的路由和相关参数 71 ---->$params 放置地址栏解析的结果数组Array ( [0] => [1] => Array ( [m] => sds [c] => dasd ) ) 72 ---->runAction($route, $params); //位于Module 73 ---->list($controller, $actionID) = $this->createController($route) 返回array('0'=>控制器controller对象,'1'=>'action名') 74 $controller 赋给Yii::$app->controller 75 ---->$controller->runAction($actionID, $params); yii/base/Controller 76 77 ---->runAction($actionID, $params); yii/base/Controller 78 ---->$action = $this->createAction($id); //生成一个InlineAction对象,赋给Yii::$app->requestedAction 79 InlineAction __construct $this->actionMethod = $actionMethod; 80 ---->beforeAction 81 ---->$action->runWithParams($params); //位于 yii/base/InlineAction 82 ---->$args = $this->controller->bindActionParams($this, $params);//位于yii/web/controller $this=>InlineAction $params=>模块/控制器 数组 --- 将参数绑定到action,返回有效参数数组$args 83 ---->赋给Yii::$app->requestedParams = $args; 84 ---->call_user_func_array([$this->controller, $this->actionMethod], $args) //执行第一个回调函数 真正执行 85 ---->afterAction 86 ---->返回执行结果(页面已出) 给Module中的runAction 87 88 ---->返回结果给handleRequest 89 ---->$response = $this->getResponse(); 返回一个response对象,具体同上 90 ---->$response->data = $result; 91 ---->返回$response给yii/base/Application 的 run $response 92 ---->$response->send();输出内容 93 <!-- 页面输出完成 --> 94 95 96
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