织梦当前文档内容自动关联tag标签做内链

function ReplaceKeyword($kw,&$body)
{
	...中间代码省略
}

function ReplaceKeyword($kw,&$body)
{
	global $cfg_replace_num;
	//如果当前文档没有tag直接不内链，需要匹配所有tag的话，删除下面行
	if(GetTags($this->Fields['aid']) == '') return $body;
	$search = "/(alt\s*=\s*|title\s*=\s*|src\s*=\s*)[\"|\'](.+?)[\"|\']/is";
	$body = preg_replace_callback($search, array('Archives', '_base64_encode'), $body);
	$addsql = '';
	$this->dsql->SetQuery("SELECT tid FROM `58pic_taglist` WHERE aid = '{$this->Fields['aid']}' ");
	$this->dsql->Execute();
	$ids = '';
	while($row = $this->dsql->GetArray())
	{
		$ids .= ( $ids=='' ? $row['tid'] : ','.$row['tid'] );
	}
	if($ids != '')
	{
		$addsql = " WHERE id IN($ids) ";
	}
	$query = "SELECT * FROM `58pic_tagindex` $addsql ORDER BY addtime DESC";
	$this->dsql->SetQuery($query);
	$this->dsql->Execute();
	$linkdatas = array();
	while($row = $this->dsql->GetArray())
	{
		$row['keyword'] = $row['tag'];
		$row['rpurl'] = $cfg_cmsurl."/tags.php?/".urlencode($row['tag'])."/";
		$linkdatas[] = $row;
	}
	if($linkdatas) {
		$word = $replacement = array();
		foreach($linkdatas as $v) {
			$word0[] = "/<a[^>]*>{$v['keyword']}<\/a>/is";
			$word1[] = '/'.$v['keyword'].'/is';
			$word2[] = $v['keyword'];
			$replacement[] = '<a href="'.$v['rpurl'].'" target="_blank">'.$v['keyword'].'</a>';
		}
		if($cfg_replace_num) {
			$body = preg_replace($word0, $word2, $body, $cfg_replace_num);
			$body = preg_replace($word1, $replacement, $body, $cfg_replace_num);
		} else {
			$body = str_replace($word2, $replacement, $body);
		}
	}
	$body = preg_replace_callback($search, array('Archives', '_base64_decode'), $body);
	return $body;
}
function _base64_encode($matches) {
	return $matches[1]."\"".base64_encode($matches[2])."\"";
}
function _base64_decode($matches) {
	return $matches[1]."\"".base64_decode($matches[2])."\"";
}