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$body = preg_replace("/(<a(.*))(>)(.*)(<)(\/a>)/isU", '\\1-]-\\4-[-\\6', $body);

//设置所有关键词 
$dsql12 = new DedeSql(); 
$query1="select * from dede_keywords"; 
$dsql12->SetQuery($query1); 
$dsql12->Execute();

while($kws = $dsql12->GetArray()) 
{

if($i > $maxkey) 
{ 
break; 
}

$body = preg_replace("/(^|>)([^<]+)(?=<|$)/sUe", "_highlight('\\2', \$karr, \$kaarr, '\\1')", $body);

}