<?
function clickable_link($text=''){
	$text=preg_replace('#(script|about|applet|activex|chrome):#is',"\\1:",$text);
	$ret=' '.$text;
	$ret=preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is","\\1<a href=\"\\2\" target=\"_blank\">\\2</a>",$ret);
	$ret=preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is","\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>",$ret);
	$ret=preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i","\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>",$ret);
	$ret=substr($ret,1);
	return $ret;
}
?>