自定义ubb代码,preg_replace()函数的一些代码__Text_preg_replace_is_msg_url_

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自定义ubb代码,preg_replace()函数的一些代码

来源: 互联网发布时间：2014-10-13

本文导语: function ubb($Text) { $Text=htmlspecialchars($Text); $Text=ereg_replace("rn","",$Text); $Text=ereg_replace("r","",$Text); $Text=nl2br($Text); $Text=preg_replace("/\t/is"," ",$Text); $Text=preg_replace("/[h1](.+?)[/h1]/is","\1",$Text); $Text=preg_repl...

function ubb($Text) {
  $Text=htmlspecialchars($Text);
  $Text=ereg_replace("rn","
",$Text);
  $Text=ereg_replace("r","
",$Text);
  $Text=nl2br($Text);
  $Text=preg_replace("/\t/is","  ",$Text);
  $Text=preg_replace("/[h1](.+?)[/h1]/is","\1",$Text);
  $Text=preg_replace("/[h2](.+?)[/h2]/is","\1",$Text);
  $Text=preg_replace("/[h3](.+?)[/h3]/is","\1",$Text);
  $Text=preg_replace("/[h4](.+?)[/h4]/is","\1",$Text);
  $Text=preg_replace("/[h5](.+?)[/h5]/is","\1",$Text);
  $Text=preg_replace("/[h6](.+?)[/h6]/is","\1",$Text);

  $Text=preg_replace("/[url](http://.+?)[/url]/is","\1",$Text);
  $Text=preg_replace("/[url](.+?)[/url]/is","http://\1",$Text);
  $Text=preg_replace("/[url=(http://.+?)](.*)[/url]/is","\2",$Text);
  $Text=preg_replace("/[url=(.+?)](.*)[/url]/is","\2",$Text);

  $Text=preg_replace("/[img](.+?)[/img]/is","",$Text);
  $Text=preg_replace("/[color=(.+?)](.+?)[/color]/is","\2",$Text);
  $Text=preg_replace("/[size=(.+?)](.+?)[/size]/is","\2",$Text);
  $Text=preg_replace("/[sup](.+?)[/sup]/is","\1",$Text);
  $Text=preg_replace("/[sub](.+?)[/sub]/is","\1",$Text);
  $Text=preg_replace("/[pre](.+?)[/pre]/is","

\1

",$Text);
  $Text=preg_replace("/[email](.+?)[/email]/is","\1",$Text);
  $Text=preg_replace("/[i](.+?)[/i]/is","\1",$Text);
  $Text=preg_replace("/[b](.+?)[/b]/is","\1",$Text);
  $Text=preg_replace("/[quote](.+?)[/quote]/is","quote:\1", $Text);
  $Text=preg_replace("/[code](.+?)[/code]/is","code:\1", $Text);
  $Text=preg_replace("/[sig](.+?)[/sig]/is","

--------------------------
\1
--------------------------

", $Text);
return $Text;
}
function str($msg){
  global $admin;
  if(!$admin[html]) $msg=htmlspecialchars($msg);
  if($admin[ubb]) $msg=ubb($msg);
  $msg=nl2br($msg); #处理message
  $msg= str_replace("n","",$msg); #处理message
  $msg= str_replace("r","",$msg); #处理message
  return $msg;
}
function error($msg){
global $admin;
?>

中的
$Text=preg_replace("/[h2](.+?)[/h2]/is","\1",$Text);

里面的 ("/[h2](.+?)[/h2]/is","\1",$text)

/[h2](.+?)[/h2]/is  转化成 \1

/[h2](.+?)[/h2]/is  里面的这些"/(.+?) "之类的符号是怎么看的?是什么意思?
______________________________________________________________________________________________

是转意，本身是特殊符号，如果要作为普通字符就要用来转意，就是说\表示()也是特殊符号，所以要用转意