后台-系统-核心设置-关键字替换 【是】后台-系统-其他选项-关键词替换次数 【1】或者【0】
关键词长短优先级问题
比如有“长词”、“我是大长词”、“我是小长词”，同时在一篇文章中出现，程序会优先使用短的词。
长短优先级问题和PHP5.5以上问题的解决方法
打开 /include/arc.archives.class.php 找到$query = "SELECT * FROM keywords WHERE rpurl<>'' ORDER BY rank DESC";改成$query = "SELECT char_length(keyword) AS num,aid,keyword,rpurl,rank FROM keywords WHERE rpurl<>'' ORDER BY num DESC";继续找到"#".preg_quote($word)."#"改成"#".preg_quote($word, "#")."(?!<)#"继续找到$body = @preg_replace_callback("#(^|>)([^<]+)(?=<|$)#sU", "_highlight('\2', $karr, $kaarr, '\1')", $body);改成global $cfg_replace_num;if($cfg_replace_num > 0){$query = "SELECT char_length(keyword) AS num,aid,keyword,rpurl,rank FROM keywords WHERE rpurl<>'' ORDER BY num DESC";$this->dsql->SetQuery($query);$this->dsql->Execute();while($row = $this->dsql->GetArray()){$key = trim($row['keyword']);$key_url=trim($row['rpurl']);$body = str_replace_limit($key, "<a href='$key_url' target='_blank'><u>$key</u></a>", $body, $cfg_replace_num);}}else{$query = "SELECT char_length(keyword) AS num,aid,keyword,rpurl,rank FROM keywords WHERE rpurl<>'' ORDER BY num DESC";$this->dsql->SetQuery($query);$this->dsql->Execute();while($row = $this->dsql->GetArray()){$key = trim($row['keyword']);$key_url=trim($row['rpurl']);$body = str_replace($key, "<a href='$key_url' target='_blank'><u>$key</u></a>", $body);}}继续找到//高亮专用在它上面加入//指定替换次数功能function str_replace_limit($search, $replace, $subject, $limit){if(is_array($search)){foreach($search as $k=>$v){$search[$k] = "#".preg_quote($search[$k], "#")."(?!<)#";}}else{$search = "#".preg_quote($search, "#")."(?!<)#";}return preg_replace($search, $replace, $subject, $limit);}完成，最终效果
