php ubb代码转换函数

function ubb($string) {
  $searcharray['bbcode_regexp'] = array(
   "/s*[quote][nr]*(.+?)[nr]*[/quote]s*/is",
   "/([box=(#[0-9A-F]{6}|[a-z]+)])[nr]*(.+?)[nr]*([/box])/is",
   "/[url]s*(www.|https?://|ftp://|gopher://|news://|telnet://|rtsp://|mms://){1}([^["']+?)s*[/url]/ie",
   "/[url=www.([^["']+?)](.+?)[/url]/is",
   "/[url=(https?|ftp|gopher|news|telnet|rtsp|mms){1}://([^["']+?)](.+?)[/url]/is",
   "/[email]s*([A-Za-z0-9-_.]+)@([A-Za-z0-9-_]+[.][A-Za-z0-9-_.]+)s*[/email]/i",
   "/[email=([A-Za-z0-9-_.]+)@([A-Za-z0-9-_]+[.][A-Za-z0-9-_.]+)](.+?)[/email]/is",
   "/[color=([^[]+?)]/i",
   "/[size=([^[]+?)]/i",
   "/[font=([^[]+?)]/i",
   "/[align=([^[]+?)]/i",
   "/[center]/i",
   "/[swf]s*([^[]+?)s*[/swf]/ies",
   "/[img]s*([^[]+?)s*[/img]/ies",
   "/[img=(d{1,3})[x|,](d{1,3})]s*([^[]+?)s*[/img]/ies"
  );
  $replacearray['bbcode_regexp'] = array(
   "

Quote:

\1

",
   "

\2 ;">$title\3

",
   "cuturl('\1\2')",
   "http://www.\1" target="_blank">\2",
   "\1://\2" target="_blank">\3",
   "\1@\2mailto:\1@\2">\1@\2>",
   "\3mailto:\1@\2">\3>",
   "\1">",
   "\1">",
   "\1">",
   "

\1">",
   "

",
   "bbcodeurl('\1', ' Flash: %s ')",
   "bbcodeurl('\1', '')",
   "bbcodeurl('\3', '')"
  );

  $searcharray['bbcode_str'] = array(
   '[/color]', '[/size]', '[/font]', '[/align]', '[b]', '[/b]',
   '[i]', '[/i]', '[u]', '[/u]', '[list]', '[list=1]', '[list=a]',
   '[list=A]', '[*]', '[/list]','[/center]'
  );

  $replacearray['bbcode_str'] = array(
   '', '', '', '

', '', '', '',
   '', '', '', '

', '
', '
',
   '
', '
1. ', '

','

'
  );                 
  $string = str_replace($searcharray['bbcode_str'], $replacearray['bbcode_str'], preg_replace($searcharray['bbcode_regexp'], $replacearray['bbcode_regexp'], $string));

                return $string;
}

function bbcodeurl($url, $tags) {
 if(!preg_match("/<.+?>/s",$url)) {
  if(!in_array(strtolower(substr($url, 0, 6)), array('http:/', 'ftp://', 'rtsp:/', 'mms://'))) {
   $url = 'http://'.$url;
  }
  return str_replace('submit', '', sprintf($tags, $url, $url));
 } else {
  return ' '.$url;
 }
}

function cuturl($url) {
 $length = 65;
 $urllink = "\1" : $url).'" target="_blank">';
 if(strlen($url) > $length) {
  $url = substr($url, 0, intval($length * 0.5)).' ... '.substr($url, - intval($length * 0.3));
 }
 $urllink .= $url.'';
 return $urllink;
}
?>

\2