php正则获取关键字、标题、网页描述代码

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获取关键字

代码如下

复制代码

function get_keywords($html) { $html=strtolower($html); preg_match("@ ]*>(.*?)@si",$html, $regs);  $headdata = $regs[1]; preg_match("/"]+)["']?/i", $headdata, $res); if (isset ($res)) { $keywords = $res[1]; } if ($keywords == "") $keywords = "无"; $keywords=replace_word(textcut($keywords,250)); $keywords=str_replace("-",",",$keywords); $keywords=str_replace("，",",",$keywords); $keywords=str_replace(" ",",",$keywords); $keywords=str_replace("|",",",$keywords); $keywords=str_replace("、",",",$keywords); $keywords=str_replace(",,",",",$keywords); $keywords=str_replace(" $keywords=str_replace(">","",$keywords); return addslashes(trim($keywords)); }

获取标题

代码如下	复制代码
function get_title($html) {   $html=strtolower($html);  $title = str_replace(" - ",",",cut($html," " )); //if ($title == "") $title = "无标题"; if ($title) $title=replace_word(textcut($title,80)); if ($title) $title=preg_replace("//","",$title); return addslashes(trim($title)); }

获取网页描述description

代码如下

复制代码

function get_description($html) { $html=strtolower($html); preg_match("@ ]*>(.*?)@si",$html, $regs);  $headdata = $regs[1]; preg_match("/"]+)["']?/i", $headdata, $res);       if (isset ($res)) {        $description = $res[1];       } if ($description == "") $description = "无"; $description=replace_word(textcut($description,250)); $description=str_replace("-",",",$description); $description=str_replace("，",",",$description); $description=str_replace(" ",",",$description); $description=str_replace("|",",",$description); $description=str_replace("、",",",$description); $description=str_replace(",,",",",$description); $description=str_replace(" $description=str_replace(">","",$description); return addslashes(trim($description)); }