php把ubb代码转换成html

function ubb($Text)
{
$Text=htmlspecialchars($Text);
$Text=stripslashes($Text);
$Text=ereg_replace("\r\n","
",$Text);
$Text=ereg_replace("\r","
",$Text);
$Text=nl2br($Text);
$Text=preg_replace("/\\t/is"," ",$Text);
$Text=ereg_replace(" "," ",$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("/\[center\](.+?)\[\/center\]/is","\\1",$Text);
$Text=preg_replace("/\[big\](.+?)\[\/big\]/is","\\1",$Text);
$Text=preg_replace("/\[small\](.+?)\[\/small\]/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);
$pattern = "/(\[uploadimage\])(\d+),(.*)(\[\/uploadimage\])/U";
$replacement = "";
$Text =@preg_replace($pattern, $replacement, $Text);
$str = $Text;
$pattern='#\[flash=(\d+),(\d+)\](.+)\[/flash\]#';
$last = "

[全屏欣赏　提醒：Flash中可能包含不安全内容]
";
$Text= preg_replace($pattern, $last, $str);
$mpg ="

";
$Text =preg_replace('#\[mp=(\d+),(\d+)\](.+)\[/mp\]#', $mpg, $Text);
return @iconv('utf-8','gbk',@iconv('gbk','utf-8',$Text));

}