php实现转换ubb代码的方法

function ubb2html($content)
{
global $article;
//是否自动识别
if ($article[isparseurl] == "1")
{
$content = parseurl($content);
}
//自动识别结束
$content = eregi_replace(quotemeta("[b]"),quotemeta("<b>"),$content);
$content = eregi_replace(quotemeta("[/b]"),quotemeta("</b>"),$content);
$content = eregi_replace(quotemeta("[i]"),quotemeta("<i>"),$content);
$content = eregi_replace(quotemeta("[/i]"),quotemeta("</i>"),$content);
$content = eregi_replace(quotemeta("[u]"),quotemeta("<u>"),$content);
$content = eregi_replace(quotemeta("[/u]"),quotemeta("</u>"),$content);
$content = eregi_replace(quotemeta("[center]"),quotemeta("<center>"),$content);
$content = eregi_replace(quotemeta("[/center]"),quotemeta("</center>"),$content);
$content = eregi_replace(quotemeta("[quote]"),quotemeta("<table width=\"96%\" border=\"0\" cellspacing=\"3\" cellpadding=\"0\" style=word-break:break-all align=\"center\"><tr><td><b>引用:</b></td></tr><tr><td><hr width=\"100%\" noshade></td></tr><tr><td class=\"content\"><font color=\"#0000FF\">"),$content);
$content = eregi_replace(quotemeta("[/quote]"),quotemeta("</font></td></tr><tr><td><hr width=\"100%\" noshade></td></tr></table>"),$content);
$content = eregi_replace(quotemeta("
复制代码 代码如下:
"),quotemeta("<table width=\"96%\" border=\"0\" cellspacing=\"3\" cellpadding=\"0\" style=word-break:break-all align=\"center\"><tr><td><b>代码:</b></td></tr><tr><td><hr width=\"100%\" noshade></td></tr><tr><td class=\"code\"><font color=\"#0000FF\">"),$content);
$content = eregi_replace(quotemeta("
"),quotemeta("</font></td></tr><tr><td><hr width=\"100%\" noshade></td></tr></table>"),$content);
$content = eregi_replace("\\[images\\]([^\\[]*)\\[/images\\]","<a href=\"\\1\" target=\"_blank\"><img src=\"\\1\" border=0 onload=\"javascript:if(this.width>screen.width-333)this.width=screen.width-333\" title=\"用新窗口浏览原始图片\"></a>",$content);
$content = eregi_replace("\\[url\\]www.([^\\[]*)\\[/url\\]", "<a href=\"http://www.\\1\" target=_blank>www.\\1</a>",$content);
$content = eregi_replace("\\[url\\]([^\\[]*)\\[/url\\]","<a href=\"\\1\" target=_blank>\\1</a>",$content);
$content = eregi_replace("\\[url=([^\\[]*)\\]([^\\[]*)\\[/url\\]","<a href=\"\\1\" target=_blank>\\2</a>",$content);
$content = eregi_replace("\\[email\\]([^\\[]*)\\[/email\\]", "<a href=\"mailto:\\1\">\\1</a>",$content);
//$content = preg_replace( /javascript/i, java script, $content);
return $content;
}