自己写的一个UBB转换的函数

function ubb2xhtml($ubb)
{
$flash=<<<END
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" width="%1$d" height="%2$d">
<param name="movie" value="%3$s" />
<param name="quality" value="high" />
<embed src="%3$s" width="%1$d" height="%2$d" quality="high" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>
</object>
END;

$match = array
(
  '%\[url=([^\s]+)\](.*?)\[/url\]%s',
  '%\[email=([^\s])+\](.*?)\[/email\]%i',
  '%\[img width=(\d+) height=(\d+)\](.*?)\[/img\]%s',
  '%\[img=([^\s]+)\/\]%s',
  '%\[flash width=(\d+) height=(\d+)\](.*?)\[/flash\]%se',
  '%\[(b|i|u|strike|sup|sub)\](.*?)\[/\]%s',
  '%\[h([1-6])\](.*?)\[/h\]%s',
  '%\[hr\/\]%s',
  '%\[color=([^\s]+)\](.*?)\[/color\]%s',
  '%\[font=([^\"]+)\](.*?)\[/font\]%s',
  '%\[size=([^\s]+)\](.*?)\[/size\]%s',
  '%\[align=(center|right|left)\](.*?)\[/align\]%s',
  '%\[valign=(middle|top|bottom)\](.*?)\[/valign\]%s',
/*
  '%\[ul\](.*?)\[/ul\]%s',
  '%\[ul=(circle|disc|square)\](.*?)\[/ul\]%s',
  '%\[ol\](.*?)\[/ol\]%s',
  '%\[ol type=([aAiI1]) start=([a-zA-Z1-9])\](.*?)\[/ol\]%s',
  '%\[li\](.*?)\[/li\]%s',
*/
  '%\[table=([^\s]+?)\](.*?)\[/table\]%s',
  '%\[caption\](.*?)\[/caption\]%s',
  '%\[tr=([^\s]+?)\](.*?)\[/tr\]%s',
  '%\[th\](.*?)\[/th\]%s',
  '%\[td\](.*?)\[/td\]%s',
  '%\[note\](.*?)\[/note\]%s',
  '%\[quote=(.*?)\](.*?)\[/quote\]%s',
  '%\[code\](.*?)\[/code\]%s',
  '%[ ]%s', // make double-spaces truly double-spaces!
);
    $replace = array
(
  '<a href="" target="_blank"></a>',
  '<a href="mailto:" target="_blank"></a>',
  '<img src="" width="" height="" border="0" />',
  '<img src="" border="0" />',
  'sprintf("$flash", "", "", "")',
  '<></>',
  '<h></h>',
  '<hr>\n',
  '<font color=""></font>',
  '<font face=""></font>',
  '<font size=""></font>',
  '<div align=""></font>',
  '<div valign=""></font>',
/*
  '<ul></ul>',
  '<ul type=""></ul>',
  '<ol></ol>',
  '<ol type="" start=""></ol>',
  '<li></li>',
*/
  "<table class=\"\" cellspacing=\"1\">\n</table>",
  "\t<caption></caption>\n",
  "\t<tr class=\"\">\n\t</tr>\n",
  "\t\t<th></th>\n",
  "\t\t<td></td>\n",
  '<div class="note"><span class="hint">发布者备注</span><hr /></div>',
  '<div class="quote"><span class="hint">引用</span>(来源: <a href="" target="_blank"></a>)<br /></div>',
  '<span class="hint" style="margin-left: 10px">代码</span><div class="code"></div>',
  '  ',
);