织梦DEDECMS显示和内容有关的专题标题内容

function getlikespc($keywords=0)   
{   
global $cfg_basehost,$dsql;   
$key = array();   
$key = explode(",",$keywords);   
$likesql;   
$len =count($key);   
for($i=0;$i<$len;$i++){   
$now = $len-$i;   
if($now==1){   
$likesql .= "keywords like '%".$key[$i]."%' ";   
}else{   
$likesql .= "keywords like '%".$key[$i]."%' or ";   
}   
}//关键字分割检索,拼接 查询语句   
$getsql = "SELECT * from  dede_archives where dede_archives.channel='-1'  
and $likesql order by  dede_archives.id ";//查询与该文章关键字相同的专题   
//echo $getsql;   
$toback;   
$dsql->Execute("m",$getsql);   
while($row = $dsql->GetObject('m'))   
{   
$title = $row->title;//专题标题   
$id = $row->id;//专题ID   
$toback = "<a href='".$cfg_basehost."/special/arc-".$id.".html' >".$title."</a>";   
}   
return $toback;//返回文章链接   
}