Container::get('app')

public static function get($abstract, $vars = [], $newInstance = false)
{return static::getInstance()->make($abstract, $vars, $newInstance);
}

實例化Container類?

public static function getInstance()
{if (is_null(static::$instance)) {static::$instance = new static;}return static::$instance;
}

初始參數為?

protected $instances = [];
protected $bind = ['app'                   => App::class,'build'                 => Build::class,'cache'                 => Cache::class,'config'                => Config::class,'cookie'                => Cookie::class,'debug'                 => Debug::class,'env'                   => Env::class,'hook'                  => Hook::class,'lang'                  => Lang::class,'log'                   => Log::class,'middleware'            => Middleware::class,'request'               => Request::class,'response'              => Response::class,'route'                 => Route::class,'session'               => Session::class,'template'              => Template::class,'url'                   => Url::class,'validate'              => Validate::class,'view'                  => View::class,'rule_name'             => route\RuleName::class,// 接口依賴注入'think\LoggerInterface' => Log::class,];/*** 容器標識別名* @var array*/protected $name = [];

make方法

public function make($abstract, $vars = [], $newInstance = false)
{if (true === $vars) {// 總是創建新的實例化對象$newInstance = true;$vars        = [];}$abstract = isset($this->name[$abstract]) ? $this->name[$abstract] : $abstract;if (isset($this->instances[$abstract]) && !$newInstance) {return $this->instances[$abstract];}if (isset($this->bind[$abstract])) {$concrete = $this->bind[$abstract];if ($concrete instanceof Closure) {$object = $this->invokeFunction($concrete, $vars);} else {$this->name[$abstract] = $concrete;return $this->make($concrete, $vars, $newInstance);}} else {$object = $this->invokeClass($abstract, $vars);}if (!$newInstance) {$this->instances[$abstract] = $object;}return $object;
}

由初始參數可以看出$this->name起始[],$abstact='app'，$instances=[]，$this->bind['app']返回think\App，$concrete=think\App，think\App不屬于Closure，$this->name['app']=think\App;$this->make(think\App,[],false);

?由上可知$this->name['app'] = think\App，$this->name[think\App]不存在，$abstract=think\App，$instances=[]，$this->bind[think\App]不存在，實例化App，返回實例化App對象。

invokeClass鏈接：ThinkPhp5源碼學習(invokeClass反射)_無涯w的博客-CSDN博客