yii\behaviors\SluggableBehavior::generateUniqueSlug PHP 메소드

    protected function generateUniqueSlug($baseSlug, $iteration)
    {
        if (is_callable($this->uniqueSlugGenerator)) {
            return call_user_func($this->uniqueSlugGenerator, $baseSlug, $iteration, $this->owner);
        }
        return $baseSlug . '-' . ($iteration + 1);
    }