SimplePie::get_language(): string|null

2950    public function get_language()2951    {2952        if ($return = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'language')) {2953            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);2954        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_11, 'language')) {2955            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);2956        } elseif ($return = $this->get_channel_tags(self::NAMESPACE_DC_10, 'language')) {2957            return $this->sanitize($return[0]['data'], self::CONSTRUCT_TEXT);2958        } elseif (isset($this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['xml_lang'])) {2959            return $this->sanitize($this->data['child'][self::NAMESPACE_ATOM_10]['feed'][0]['xml_lang'], self::CONSTRUCT_TEXT);2960        } elseif (isset($this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['xml_lang'])) {2961            return $this->sanitize($this->data['child'][self::NAMESPACE_ATOM_03]['feed'][0]['xml_lang'], self::CONSTRUCT_TEXT);2962        } elseif (isset($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['xml_lang'])) {2963            return $this->sanitize($this->data['child'][self::NAMESPACE_RDF]['RDF'][0]['xml_lang'], self::CONSTRUCT_TEXT);2964        } elseif (isset($this->data['headers']['content-language'])) {2965            return $this->sanitize($this->data['headers']['content-language'], self::CONSTRUCT_TEXT);2966        }2967 2968        return null;2969    }