TP6 依賴注入

public function invokeClass(string $class, array $vars = [])
{
    try {
       //根據反射機制獲取 類的內部信息(多少個私有屬性，多少個共有屬性等等)
        $reflect = new ReflectionClass($class);
    } catch (ReflectionException $e) {
        throw new ClassNotFoundException('class not exists: ' . $class, $class, $e);
    }

    if ($reflect->hasMethod('__make')) {
        $method = $reflect->getMethod('__make');
        if ($method->isPublic() && $method->isStatic()) {
            $args = $this->bindParams($method, $vars);
            return $method->invokeArgs(null, $args);
        }
    }
    //獲取構造函數
    $constructor = $reflect->getConstructor();

    //分析構造函數的參數，並獲取具體的參數
    $args = $constructor ? $this->bindParams($constructor, $vars) : [];
    //帶參數實例化對應的類
    $object = $reflect->newInstanceArgs($args);

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

    return $object;
}