php UBB 解析实现代码

$Text=preg_replace("/[code](.+?)[/code]/eis","highlight_code('1')", $Text);
$Text=preg_replace("/[php](.+?)[/php]/eis","highlight_code('1')", $Text);
$Text=preg_replace("/[sig](.+?)[/sig]/is","<div style='text-align: left; color: darkgreen; margin-left: 5%'><br><br>--------------------------<br>1<br>--------------------------</div>", $Text);
return $Text;
}