dedecms怎么自动给已经发布过的文章中的关键词加超链接

foreach($kws as $k) 
{ 
$k = trim($k); 
if($k!=”") 
{ 
if($i > $maxkey) 
{ 
break; 
} 
$myrow = $this->dsql->GetOne(“select * from dede_keywords where keyword=’$k’ And rpurl<>” “); 
if(is_array($myrow)) 
{ 
$karr[] = $k; 
$GLOBALS['replaced'][$k] = 0; 
$kaarr[] = “$k”; 
} 
$i++; 
} 
}

global $dsql; 
$query=”SELECT * FROM dede_keywords WHERE rpurl<>” ORDER BY rank DESC”; 
$dsql->SetQuery($query); 
$dsql->Execute(); 
while($row = $dsql->GetArray()) 
{ 
$key = trim($row['keyword']); 
$key_url=trim($row['rpurl']); 
$karr[] = $key; 
$kaarr[] = “$key”; 
}