PHP写的UBB代码转换函数 ubb转html

<?php
function ubb($Text) {
	$Text=trim($Text);
	$Text=ereg_replace("
","<br>",$Text);
	$Text=preg_replace("/\t/is","  ",$Text);
	$Text=preg_replace("/[hr]/is","<hr>",$Text);
	$Text=preg_replace("/[separator]/is","<br/>",$Text);
	$Text=preg_replace("/[h1](.+?)[/h1]/is","<h1>\1</h1>",$Text);
	$Text=preg_replace("/[h2](.+?)[/h2]/is","<h2>\1</h2>",$Text);
	$Text=preg_replace("/[h3](.+?)[/h3]/is","<h3>\1</h3>",$Text);
	$Text=preg_replace("/[h4](.+?)[/h4]/is","<h4>\1</h4>",$Text);
	$Text=preg_replace("/[h5](.+?)[/h5]/is","<h5>\1</h5>",$Text);
	$Text=preg_replace("/[h6](.+?)[/h6]/is","<h6>\1</h6>",$Text);
	$Text=preg_replace("/[center](.+?)[/center]/is","<center>\1</center>",$Text);
	//$Text=preg_replace("/[url=([^[]*)](.+?)[/url]/is","<a href=\1 target='_blank'>\2</a>",$Text);
	$Text=preg_replace("/[url](.+?)[/url]/is","<a href="\1" target='_blank'>\1</a>",$Text);
	$Text=preg_replace("/[url=(http://.+?)](.+?)[/url]/is","<a href='\1' target='_blank'>\2</a>",$Text);
	$Text=preg_replace("/[url=(.+?)](.+?)[/url]/is","<a href=\1>\2</a>",$Text);
	$Text=preg_replace("/[img](.+?)[/img]/is","@@##@@",$Text);
	$Text=preg_replace("/[imgs(.+?)](.+?)[/img]/is","@@##@@",$Text);
	$Text=preg_replace("/[color=(.+?)](.+?)[/color]/is","<font color=\1>\2</font>",$Text);
	$Text=preg_replace("/[colorTxt](.+?)[/colorTxt]/eis","color_txt('\1')",$Text);
	$Text=preg_replace("/[style=(.+?)](.+?)[/style]/is","<div class='\1'>\2</div>",$Text);
	$Text=preg_replace("/[size=(.+?)](.+?)[/size]/is","<font size=\1>\2</font>",$Text);
	$Text=preg_replace("/[sup](.+?)[/sup]/is","<sup>\1</sup>",$Text);
	$Text=preg_replace("/[sub](.+?)[/sub]/is","<sub>\1</sub>",$Text);
	$Text=preg_replace("/[pre](.+?)[/pre]/is","<pre class="brush:php;toolbar:false;">\1