腾讯QQ微博API接口获取微博内容(2)

// returns the next sibling of node   
    function next_sibling() {
        if ($this->parent===null) return null;
        $idx = 0;
        $count = count($this->parent->children);
        while ($idx<$count && $this!==$this->parent->children[$idx])
            ++$idx;
        if (++$idx>=$count) return null;
        return $this->parent->children[$idx];
    }

// returns the previous sibling of node
    function prev_sibling() {
        if ($this->parent===null) return null;
        $idx = 0;
        $count = count($this->parent->children);
        while ($idx<$count && $this!==$this->parent->children[$idx])
            ++$idx;
        if (--$idx<0) return null;
        return $this->parent->children[$idx];
    }

// get dom node's inner html
    function innertext() {
        if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
        if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

$ret = '';
        foreach($this->nodes as $n)
            $ret .= $n->outertext();
        return $ret;
    }

// get dom node's outer text (with tag)
    function outertext() {
        if ($this->tag==='root') return $this->innertext();

// trigger callback
        if ($this->dom->callback!==null)
            call_user_func_array($this->dom->callback, array($this));

if (isset($this->_[HDOM_INFO_OUTER])) return $this->_[HDOM_INFO_OUTER];
        if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

// render begin tag
        $ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();

// render inner text
        if (isset($this->_[HDOM_INFO_INNER]))
            $ret .= $this->_[HDOM_INFO_INNER];
        else {
            foreach($this->nodes as $n)
                $ret .= $n->outertext();
        }

// render end tag
        if(isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END]!=0)
            $ret .= '</'.$this->tag.'>';
        return $ret;
    }

// get dom node's plain text
    function text() {
        if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
        switch ($this->nodetype) {
            case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
            case HDOM_TYPE_COMMENT: return '';
            case HDOM_TYPE_UNKNOWN: return '';
        }
        if (strcasecmp($this->tag, 'script')===0) return '';
        if (strcasecmp($this->tag, 'style')===0) return '';

$ret = '';
        foreach($this->nodes as $n)
            $ret .= $n->text();
        return $ret;
    }

    function xmltext() {
        $ret = $this->innertext();
        $ret = str_ireplace('<![CDATA[', '', $ret);
        $ret = str_replace(']]>', '', $ret);
        return $ret;
    }