protected function parseTags($tags)
    {
        return array_unique(is_array($tags) ? array_filter($tags) : preg_split('/\s*,\s*/', $tags, -1, PREG_SPLIT_NO_EMPTY));
    }
protected function parseTags($tags)
    {
        return array_unique(is_array($tags) ? array_filter($tags) : preg_split('/\s*,\s*/', $tags, -1, PREG_SPLIT_NO_EMPTY));
    }
protected function parseTags ( $ tags ) { return array_unique ( is_array ( $ tags ) ? array_filter ( $ tags ) : preg_split ( '/\s*,\s*/' , $ tags , - 1 , PREG_SPLIT_NO_EMPTY ) ) ; }
Parse tags list into array
@param string|string[] $tags list of tags. If specified as a string, the tags must be separated by commas
@return string[]
Parse tags list into array