function bbcode_simple ($s) {
$page = preg_quote(dirname(str_replace('www.','',$_SERVER["HTTP_HOST"]).$_SERVER["SCRIPT_NAME"]), '/');
$search = array (
"/[b](.*?)[/b]/si",
"/[i](.*?)[/i]/si",
"/[u](.*?)[/u]/si",
"/[s](.*?)[/s]/si",
"/[center](.*?)[/center]/si",
"/[color=rot](.*?)[/color]/si",
"/[color=gelb](.*?)[/color]/si",
"/[color=gruen](.*?)[/color]/si",
"/[color=blau](.*?)[/color]/si",
"/[url=http://(www.)?(".$page.")(.*?)](.*?)[/url]/si",
"/[url=http://(www.)?(.*?)](.*?)[/url]/si",
"/[*]([^[]*)/is",
"/[list](.+)[/list]/Usi",
"/[list=1](.+)[/list]/Usi",
"/(script|about|applet|activex|chrome):/is",
);
$replace = array (
"<b>1</b>",
"<i>1</i>",
"<u>1</u>",
"<s>1</s>",
"<center>1</center>",
"<span style='color:Red'>1</span>",
"<span style='color:Yellow'>1</span>",
"<span style='color:Green'>1</span>",
"<span style='color:Blue'>1</span>",
"<li>1</li>",
"<ul>1</ul>",
"<ol>1</ol>",
"1:",
);
$s = preg_replace($search, $replace, $s);
return ($s);
}