yii\web\Controller::bindActionParams PHP Method

    public function bindActionParams($action, $params)
    {
        if ($action instanceof InlineAction) {
            $method = new \ReflectionMethod($this, $action->actionMethod);
        } else {
            $method = new \ReflectionMethod($action, 'run');
        }
        $args = [];
        $missing = [];
        $actionParams = [];
        foreach ($method->getParameters() as $param) {
            $name = $param->getName();
            if (array_key_exists($name, $params)) {
                if ($param->isArray()) {
                    $args[] = $actionParams[$name] = (array) $params[$name];
                } elseif (!is_array($params[$name])) {
                    $args[] = $actionParams[$name] = $params[$name];
                } else {
                    throw new BadRequestHttpException(Yii::t('yii', 'Invalid data received for parameter "{param}".', ['param' => $name]));
                }
                unset($params[$name]);
            } elseif ($param->isDefaultValueAvailable()) {
                $args[] = $actionParams[$name] = $param->getDefaultValue();
            } else {
                $missing[] = $name;
            }
        }
        if (!empty($missing)) {
            throw new BadRequestHttpException(Yii::t('yii', 'Missing required parameters: {params}', ['params' => implode(', ', $missing)]));
        }
        $this->actionParams = $actionParams;
        return $args;
    }