php中自动提取文章内容关键字seo优化网站的函数方法

利用discuz的基础条件实现文章内容自动提取关键字，进而优化网站内链的函数方法方法一：此方法提取的关键字比较接近

function getkey($contents){  //$rows = strip_tags($contents);$arr = array(' ',' ',"\s", "\r\n", "\n", "\r", "\t", ">", "“", "”","<br />");$qc_rows = str_replace($arr, '', $rows);if(strlen($qc_rows)>2400){$qc_rows = substr($qc_rows, '0', '2400');}$data = @implode('', file("http://keyword.discuz.com/related_kw.html?title=$qc_rows&ics=gbk&ocs=gbk"));preg_match_all("/<kw>(.*)A\[(.*)\]\](.*)><\/kw>/",$data, $out, PREG_SET_ORDER);$key="";for($i=0;$i<5;$i++){$key=$key.$out[$i][2];if($out[$i][2])$key=$key.",";}return $key; }

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方法二：此方法提取的关键字相对上面差一点点

function getkey($contents){ $key = '';$rows = strip_tags($contents); $arr = array(' ',' ',"\s", "\r\n", "\n", "\r", "\t", ">", "“", "”"); $qc_rows = str_replace($arr, '', $rows); if(strlen($qc_rows)>2400){ $qc_rows = substr($qc_rows, '0', '2400'); } $data = @implode('', file("http://keyword.discuz.com/related_kw.html?title=$contents&ics=gbk&ocs=gbk")); preg_match_all("/<kw>(.*)A\[(.*)\]\](.*)><\/kw>/",$data, $out, PREG_SET_ORDER); for($i=0;$i<5;$i++){ $key=$key.$out[$i][2]; if($out[$i][2])$key=$key.","; } return $key; }

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