http://www.dzhope.com/index.php zh-cn http://www.dzhope.com/post// jed <jed521@163.com> Wed, 11 Oct 2006 23:51:50 +0000 http://www.dzhope.com/post//
用preg_replace

function GetHtmlText($str)
{
$str = preg_replace("/<sty(.*)\/style>|<scr(.*)\/script>|<!--(.*)-->/isU","",$str);
 $alltext = "";
 $start = 1;
 for($i=0;$i<strlen($str);$i++){
   if($start==0 && $str[$i]==">") $start = 1;
   else if($start==1){
    if($str[$i]=="<"){ $start = 0; $alltext .= " "; }
    else if(ord($str[$i])>32) $alltext .= $str[$i];
   }
 }
 $alltext = preg_replace("/&([^;&]*)(;|&)/"," ",$alltext);
 $alltext = preg_replace("/　{1,}/"," ",$alltext);
 $alltext = preg_replace("/ {1,}/"," ",$alltext);
 return $alltext;
}

用ereg_replace

function GetHtmlText($str)
{
$str = eregi_replace("<sty(.*)/style>|<scr(.*)/script>|<!--(.*)-->","",$str);
 $alltext = "";
 $start = 1;
 for($i=0;$i<strlen($str);$i++){
   if($start==0 && $str[$i]==">") $start = 1;
   else if($start==1){
    if($str[$i]=="<"){ $start = 0; $alltext .= " "; }
    else if(ord($str[$i])>32) $alltext .= $str[$i];
   }
 }
 $alltext = ereg_replace("&([^;&]*)(;|&)"," ",$alltext);
 $alltext = ereg_replace("　{1,}"," ",$alltext);
 $alltext = ereg_replace(" {1,}"," ",$alltext);
 return $alltext;
}

经过多次测试对比，用preg_replace的函数普遍在 0.08-0.12秒之间，用ereg_replace的函数却去到0.35-0.38秒之间，测试的网页为百度的主页，我的系统是图拉丁 1.1G的CPU，384M的内存。

如果你的程序中还有使用ereg处理较长文本的，建议马上更改过来。




]]> http://www.dzhope.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.dzhope.com/post//#blogcomment