Thinkphp6 生命周期流程 1

1.index.php入口文件实例化  app类(继承contain容器)也是tp主要的核心类

       创建app类时初始化路径和绑定类别名最后把实例存储到 $this->instances里

require __DIR__ . '/../vendor/autoload.php';

// 执行HTTP应用并响应
$http = (new App())->http;


$response = $http->run();

$response->send();

$http->end($response);

/**
     * 架构方法
     * @access public
     * @param string $rootPath 应用根目录
     */
    public function __construct(string $rootPath = '')
    {
        $this->thinkPath   = realpath(dirname(__DIR__)) . DIRECTORY_SEPARATOR;
        $this->rootPath    = $rootPath ? rtrim($rootPath, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR : $this->getDefaultRootPath();
        $this->appPath     = $this->rootPath . 'app' . DIRECTORY_SEPARATOR;
        $this->runtimePath = $this->rootPath . 'runtime' . DIRECTORY_SEPARATOR;

        if (is_file($this->appPath . 'provider.php')) {
            $this->bind(include $this->appPath . 'provider.php');
        }

        static::setInstance($this);  //将自身实例存入$this->instance
        $this->instance('app', $this);    //将实例化类存入$this->instances 数组里
        $this->instance('think\Container', $this);
    }

2.调用不存在的http属性触发调用get make()通过反射实例化并返回

/**
     * 调用反射执行类的实例化 支持依赖注入
     * @access public
     * @param string $class 类名
     * @param array  $vars  参数
     * @return mixed
     */
    public function invokeClass(string $class, array $vars = [])
    {
        try {
            $reflect = new ReflectionClass($class);
        } catch (ReflectionException $e) {
            throw new ClassNotFoundException('class not exists: ' . $class, $class, $e);
        }

        if ($reflect->hasMethod('__make')) {  //判断make方法是否存在 和构造函数差不多
            $method = $reflect->getMethod('__make');    //获取make方法的信息
            if ($method->isPublic() && $method->isStatic()) {
                $args   = $this->bindParams($method, $vars);
                $object = $method->invokeArgs(null, $args);  //调用反射类方法返回值
                $this->invokeAfter($class, $object);
                return $object;
            }
        }

        $constructor = $reflect->getConstructor();  //获取构造函数的信息（参数类型和参数列表）

        $args = $constructor ? $this->bindParams($constructor, $vars) : [];

        $object = $reflect->newInstanceArgs($args); //实例化类 返回类

        $this->invokeAfter($class, $object);

        return $object;
    }

3.tp6 通过自定义static __make函数实现实例化返回实例化类没有__make则是通过构造函数