mdm\admin\models\Route::getControllerFiles PHP Method

    protected function getControllerFiles($module, $namespace, $prefix, &$result)
    {
        $path = Yii::getAlias('@' . str_replace('\\', '/', $namespace), false);
        $token = "Get controllers from '{$path}'";
        Yii::beginProfile($token, __METHOD__);
        try {
            if (!is_dir($path)) {
                return;
            }
            foreach (scandir($path) as $file) {
                if ($file == '.' || $file == '..') {
                    continue;
                }
                if (is_dir($path . '/' . $file) && preg_match('%^[a-z0-9_/]+$%i', $file . '/')) {
                    $this->getControllerFiles($module, $namespace . $file . '\\', $prefix . $file . '/', $result);
                } elseif (strcmp(substr($file, -14), 'Controller.php') === 0) {
                    $baseName = substr(basename($file), 0, -14);
                    $name = strtolower(preg_replace('/(?<![A-Z])[A-Z]/', ' \\0', $baseName));
                    $id = ltrim(str_replace(' ', '-', $name), '-');
                    $className = $namespace . $baseName . 'Controller';
                    if (strpos($className, '-') === false && class_exists($className) && is_subclass_of($className, 'yii\\base\\Controller')) {
                        $this->getControllerActions($className, $prefix . $id, $module, $result);
                    }
                }
            }
        } catch (\Exception $exc) {
            Yii::error($exc->getMessage(), __METHOD__);
        }
        Yii::endProfile($token, __METHOD__);
    }