Parser::tag_open( $parser, $tag, $attributes )

265    public function tag_open($parser, $tag, $attributes)266    {267        [$this->namespace[], $this->element[]] = $this->split_ns($tag);268 269        $attribs = [];270        foreach ($attributes as $name => $value) {271            [$attrib_namespace, $attribute] = $this->split_ns($name);272            $attribs[$attrib_namespace][$attribute] = $value;273        }274 275        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'])) {276            $base = $this->registry->call(Misc::class, 'absolutize_url', [$attribs[\SimplePie\SimplePie::NAMESPACE_XML]['base'], end($this->xml_base)]);277            if ($base !== false) {278                $this->xml_base[] = $base;279                $this->xml_base_explicit[] = true;280            }281        } else {282            $this->xml_base[] = end($this->xml_base);283            $this->xml_base_explicit[] = end($this->xml_base_explicit);284        }285 286        if (isset($attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'])) {287            $this->xml_lang[] = $attribs[\SimplePie\SimplePie::NAMESPACE_XML]['lang'];288        } else {289            $this->xml_lang[] = end($this->xml_lang);290        }291 292        if ($this->current_xhtml_construct >= 0) {293            $this->current_xhtml_construct++;294            if (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_XHTML) {295                $this->data['data'] .= '<' . end($this->element);296                if (isset($attribs[''])) {297                    foreach ($attribs[''] as $name => $value) {298                        $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';299                    }300                }301                $this->data['data'] .= '>';302            }303        } else {304            $this->datas[] = &$this->data;305            $this->data = &$this->data['child'][end($this->namespace)][end($this->element)][];306            $this->data = ['data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang)];307            if ((end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_03 && in_array(end($this->element), ['title', 'tagline', 'copyright', 'info', 'summary', 'content']) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml')308            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_ATOM_10 && in_array(end($this->element), ['rights', 'subtitle', 'summary', 'info', 'title', 'content']) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')309            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_20 && in_array(end($this->element), ['title']))310            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_090 && in_array(end($this->element), ['title']))311            || (end($this->namespace) === \SimplePie\SimplePie::NAMESPACE_RSS_10 && in_array(end($this->element), ['title']))) {312                $this->current_xhtml_construct = 0;313            }314        }315    }