缺少扩展类时无法捕获错误

Question

我尝试遍历所有已加载的类，这些类扩展了某个类。 但是is_subclass_of抛出“找不到类”错误，如果原因是没有自动加载的扩展类-我无法捕获它。

        $allClasses = 'vendor/composer/autoload_classmap.php';
            $classes=[];
            foreach ($allClasses as $name => $file){
                try {

                    if (is_subclass_of($name,'mynamespace\\project\\src\\models\\BaseWintypeModel'))
                    {
                        $classes[] = $name;
                    }

                }
                catch(\Throwable $e)
                {
                    echo "caught exception";
                }
            }

例如，错误

PHP Fatal Error – yii\base\ErrorException
Class 'Illuminate\Support\ServiceProvider' not found
1. in /www/fresh/vendor/nesbot/carbon/src/Carbon/Laravel/ServiceProvider.php

因为

class ServiceProvider extends \Illuminate\Support\ServiceProvider