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ubbcode类
<?
//ubbcode类
class ubbcode{
var $call_time=0;
//可处理标签及处理函数对应表
var $tags = array( //小写的标签 => 对应的处理函数
'url' => '$this->url',
'email' => '$this->email',
'img' => '$this->img',
'flash' => '$this->flash',
'sound' => '$this->sound',
'black' => '$this->font_color',
'white' => '$this->font_color',
'red' => '$this->font_color',
'pink' => '$this->font_color',
'blue' => '$this->font_color',
'green' => '$this->font_color',
'olive' => '$this->font_color',
'navy' => '$this->font_color',
'gray'=> '$this->font_color',
'fuchsia' => '$this->font_color',
'yellow' => '$this->font_color',
'silver' => '$this->font_color',
'purple' => '$this->font_color',
'marquee' => '$this->simple',
'b' => '$this->simple',
'i' => '$this->simple',
'u' => '$this->simple',
'tt' => '$this->simple',
's' => '$this->simple',
'strike' => '$this->simple',
'h1' => '$this->simple',
'h2' => '$this->simple',
'h3' => '$this->simple',
'h4' => '$this->simple',
'h5' => '$this->simple',
'h6' => '$this->simple',
'sup' => '$this->simple',
'sub' => '$this->simple',
'em' => '$this->simple',
'strong' => '$this->simple',
'code' => '$this->simple',
'samp' => '$this->simple',
'kbd' => '$this->simple',
'var' => '$this->simple',
'dfn' => '$this->simple',
'cite' => '$this->simple',
'small' => '$this->simple',
'big' => '$this->simple',
'blink' => '$this->simple'
);
//url裢接属性
var $attr_url;
//url合法性检查对象
var $urlcheck;
function ubbcode($attr_url){
$this->attr_url = ''.$attr_url;
$this->urlcheck = new urlcheck();
}
//对$str进行ubb编码解析
function parse($str){
$this->call_time++;
$parse = ''.htmlencode($str);
$ret = '';
while(true){
$eregi_ret=eregi("\[[#]{0,1}[[:alnum:]]{1,7}\]",$parse,$eregi_arr); //查找[xx]
if(!$eregi_ret){
$ret .= $parse;
break; //如果没有，返回
}
$pos = @strpos($parse,$eregi_arr[0]);
$tag_len=strlen($eregi_arr[0])-2;//标记长度
$tag_start=substr($eregi_arr[0],1,$tag_len);
$tag=strtolower($tag_start);
if((($tag=="url") or ($tag=="email") or ($tag=="img") or ($tag=="flash")) and ($this->call_time>1)){
echo $this->call_time."<br>";
return $parse;//如果不能是不能嵌套的标记，直接返回
}
$parse2 = substr($parse,0,$pos);//标记之前
$parse = substr($parse,$pos+$tag_len+2);//标记之后
if(!isset($this->tags[$tag])){
echo "$tag_start<br>";
$ret .= $parse2.'['.$tag_start.']';
continue;//如果是不支持的标记
}
//查找对对应的结束标记
$eregi_ret=eregi("\[\/".$tag."\]",$parse,$eregi_arr);
if(!$eregi_ret){
$ret .= $parse2.'['.$tag_start.']';
continue;//如果没有对应该的结束标记
}
$pos=strpos($parse,$eregi_arr[0]);
$value=substr($parse,0,$pos);//这是起止标记之间的内容
$tag_end=substr($parse,$pos+2,$tag_len);
$parse=substr($parse,$pos+$tag_len+3);//结束标记之后的内容
if(($tag!="url") and ($tag!="email") and ($tag!="img")and ($tag!="flash")){
$value=$this->parse($value);
}
$ret .= $parse2;
eval('$ret .= '.$this->tags[$tag].'("'.$tag_start.'","'.$tag_end.'","'.$value.'");');
}
$this->call_time--;
return $ret;
}
function simple($start,$end,$value){
return '<'.$start.'>'.$value.'</'.$end.'>';
}
function url($start,$end,$value){
$trim_value=trim($value);
if (strtolower(substr($trim_value,0,7))!="http://")
$trim_value="http://".$trim_value;
if($this->urlcheck->check($trim_value)) return '<a href="'.$trim_value.'" '.$this->attr_url.'>'.$value.'</a>';
else return '['.$start.']'.$value.'[/'.$end.']';
}
function email($start,$end,$value){
if(emailcheck($value)) return '<a href="mailto:'.$value.'">'.$value.'</a>';
else return '['.$start.']'.$value.'[/'.$end.']';
}
function img($start,$end,$value){
$trim_value=trim($value);
if ((strtolower(substr($trim_value,0,7))!="http://") or ($this->urlcheck->check($trim_value)))
return '<img src="'.$trim_value.'"></img>';
else return '['.$start.']'.$value.'[/'.$end.']';
}
function flash($start,$end,$value){
$trim_value=trim($value);
if ((strtolower(substr($trim_value,0,7))!="http://") or ($this->urlcheck->check($trim_value)))
return '<embed src='.$trim_value.' quality=high pluginspage=http://www.macromedia.com/shockwave/download/index.cgi?p1_prod_version=shockwaveflash type=application/x-shockwave-flash width=520 height=360>';
else return '['.$start.']'.$value.'[/'.$end.']';
}
function sound($start,$end,$value){
$trim_value=trim($value);
if ((strtolower(substr($trim_value,0,7))!="http://") or ($this->urlcheck->check($trim_value)))
return "<embed src=".$trim_value." hidden autostart=true loop=true>";
else return '['.$start.']'.$value.'[/'.$end.']';
}
function font_color($start,$end,$value){
if(strstr("blackwhiteredpinkbluegreenolivenavygrayfuchsiayellowsilverpurple",$start))
return "<font color=".$start.">".$value."</font>";
else return '['.$start.']'.$value.'[/'.$end.']';
}
}
//urlcheck.php
class urlcheck{
var $regex = array(//协议名(注意在这里必须写成小写) => 对应的正则表达式
'ftp' => '$this->ftpurl',
'file' => '$this->fileurl',
'http' => '$this->httpurl',
'https' => '$this->httpurl',
'gopher' => '$this->gopherurl',
'news' => '$this->newsurl',
'nntp' => '$this->nntpurl',
'te.net' => '$this->te.neturl',
'wais' => '$this->waisurl'
);
var $lowalpha;
var $hialpha;
var $alpha;
var $digit;
var $safe;
var $extra;
var $national;
var $punctuation;
var $reserved;
var $hex;
var $escape;
var $unreserved;
var $uchar;
var $xchar;
var $digits;
var $urlpath;
var $password;
var $user;
var $port;
var $hostnumber;
var $alphadigit;
var $toplabel;
var $domainlabel;
var $hostname;
var $host;
var $hostport;
var $login;
//ftp
var $ftptype;
var $fsegment;
var $fpath;
var $ftpurl;
//file
var $fileurl;
//http,https
var $search;
var $hsegment;
var $hpath;
var $httpurl;
//gopher
var $gopher_string;
var $selector;
var $gtype;
var $gopherurl;
//news
var $article;
var $group;
var $grouppart;
var $newsurl;
//nntp
var $nntpurl;
//te.net
var $te.neturl;
//wais
var $wpath;
var $wtype;
var $database;
var $waisdoc;
var $waisindex;
var $waisdatabase;
var $waisurl;
function check($url){
$pos = @strpos($url,':',1);
if($pos<1) return false;
$prot = substr($url,0,$pos);
if(!isset($this->regex[$prot])) return false;
eval('$regex = '.$this->regex[$prot].';');
return ereg('^'.$regex.'$',$url);
}
function urlcheck(){
$this->lowalpha = '[a-z]';
$this->hialpha = '[a-z]';
$this->alpha = '('.$this->lowalpha.''.$this->hialpha.')';
$this->digit = '[0-9]';
$this->safe = '[$.+_-]';
$this->extra = '[*()\'!,]';
$this->national = '([{}\^~`]\\[\\])';
$this->punctuation = '[<>#%"]';
$this->reserved = '[?;/:@&=]';
$this->hex = '('.$this->digit.'[a-fa-f])';
$this->escape = '(%'.$this->hex.'{2})';
$this->unreserved = '('.$this->alpha.''.$this->digit.''.$this->safe.''.$this->extra.')';
$this->uchar = '('.$this->unreserved.''.$this->escape.')';
$this->xchar = '('.$this->unreserved.''.$this->reserved.''.$this->escape.')';
$this->digits = '('.$this->digit.'+)';
$this->urlpath = '('.$this->xchar.'*)';
$this->password = '(('.$this->uchar.'[?;&=]'.')*)';
$this->user = '(('.$this->uchar.'[?;&=]'.')*)';
$this->port = $this->digits;
$this->hostnumber = '('.$this->digits.'.'.$this->digits.'.'.$this->digits.'.'.$this->digits.')';
$this->alphadigit = '('.$this->alpha.''.$this->digit.')';
$this->toplabel = '('.$this->alpha.'('.$this->alpha.'('.$this->alphadigit.'-)*'.$this->alphadigit.'))';
$this->domainlabel = '('.$this->alphadigit.'('.$this->alphadigit.'('.$this->alphadigit.'-)*'.$this->alphadigit.'))';
$this->hostname = '(('.$this->domainlabel.'\\.)*'.$this->toplabel.')';
$this->host = '('.$this->hostname.''.$this->hostnumber.')';
$this->hostport = '('.$this->host.'(:'.$this->port.')?)';
$this->login = '(('.$this->user.'(:'.$this->password.')?@)?'.$this->hostport.')';
$this->ftptype = '[aidaid]';
$this->fsegment = '(('.$this->uchar.'[?:@&=])*)';
$this->fpath = '('.$this->fsegment.'(/'.$this->fsegment.')*)';
$this->ftpurl = '([ff][tt][pp]://'.$this->login.'(/'.$this->fpath.'(;[tt][yy][pp][ee]='.$this->ftptype.')?)?)';
$this->fileurl = '([ff][ii][ll][ee]://('.$this->host.'[ll][oo][cc][aa][ll][hh][oo][ss][tt])?/'.$this->fpath.')';
$this->search = '(('.$this->uchar.'[;:@&=])*)';
$this->hsegment = '(('.$this->uchar.'[;:@&=])*)';
$this->hpath = '('.$this->hsegment.'(/'.$this->hsegment.')*)';
$this->httpurl = '([hh][tt][tt][pp][ss]?://'.$this->hostport.'(/'.$this->hpath.'([?]'.$this->search.')?)?)';
$this->gopher_string = '('.$this->xchar.'*)';
$this->selector = '('.$this->xchar.'*)';
$this->gtype = $this->xchar;
$this->gopherurl = '([gg][oo][pp][hh][ee][rr]://'.$this->hostport.'(/('.$this->gtype.'('.$this->selector.'(%09'.$this->search.'(%09'.$this->gopher_string.')?)?)?)?)?)';
$this->article = '(('.$this->uchar.'[;/?:&=])+@'.$this->host.')';
$this->group = '('.$this->alpha.'('.$this->alpha.''.$this->digit.'[-.+_])*)';
$this->grouppart = '([*]'.$this->group.''.$this->article.')';
$this->newsurl = '([nn][ee][ww][ss]:'.$this->grouppart.')';
$this->nntpurl = '([nn][nn][tt][pp]://'.$this->hostport.'/'.$this->group.'(/'.$this->digits.')?)';
$this->te.neturl = '([tt][ee][ll][nn][ee][tt]://'.$this->login.'/?)';
$this->wpath = '('.$this->uchar.'*)';
$this->wtype = '('.$this->uchar.'*)';
$this->database = '('.$this->uchar.'*)';
$this->waisdoc = '([ww][aa][ii][ss]://'.$this->hostport.'/'.$this->database.'/'.$this->wtype.'/'.$this->wpath.')';
$this->waisindex = '([ww][aa][ii][ss]://'.$this->hostport.'/'.$this->database.'[?]'.$this->search.')';
$this->waisdatabase = '([ww][aa][ii][ss]://'.$this->hostport.'/'.$this->database.')';
$this->waisurl = '('.$this->waisdatabase.''.$this->waisindex.''.$this->waisdoc.')';
}
}
function htmlencode($str){
$str = (string)$str;
$ret = '';
$len = strlen($str);
$nl = false;
for($i=0;$i<$len;$i++){
$chr = $str[$i];
switch($chr){
case '<':
$ret .= '<';
$nl = false;
break;
case '>':
$ret .= '>';
$nl = false;
break;
case '"':
$ret .= '"';
$nl = false;
break;
case '&':
$ret .= '&';
$nl = false;
break;
/*
case ' ':
$ret .= ' ';
$nl = false;
break;
*/
case chr(9):
$ret .= ' ';
$nl = false;
break;
/*
case chr(10):
if($nl) $nl = false;
else{
$ret .= '<br>';
$nl = true;
}
break;
case chr(13):
if($nl) $nl = false;
else{
$ret .= '<br>';
$nl = true;
}
break;
*/
default:
$ret .= $chr;
$nl = false;
break;
}
}
return $ret;
}
function htmlencode4textarea($str){
$str = (string)$str;
$ret = '';
$len = strlen($str);
for($i=0;$i<$len;$i++){
$chr = $str[$i];
switch($chr){
case '<':
$ret .= '<';
break;
case '>':
$ret .= '>';
break;
case '"':
$ret .= '"';
break;
case '&':
$ret .= '&';
break;
case ' ':
$ret .= ' ';
break;
case chr(9):
$ret .= ' ';
break;
default:
$ret .= $chr;
break;
}
}
return $ret;
}
function emailcheck($email){
$ret=false;
if(strstr($email, '@') && strstr($email, '.')){
if(eregi("^([_a-z0-9]+([\\._a-z0-9-]+)*)@([a-z0-9]{2,}(\\.[a-z0-9-]{2,})*\\.[a-z]{2,3})$", $email)){
$ret=true;
}
}
return $ret;
}
function str2url($path){
return eregi_replace("%2f","/",urlencode($path));
}
?>
--------------------------
说明：在网上找了半天发现全是何志强的那段代码，我也就拿来改了一下用上了。其中加入了一部分自己的内容，只是还不太清楚如何规定图片等元素的大小。我曾经把 function img($start,$end,$value){
$trim_value=trim($value);
if ((strtolower(substr($trim_value,0,7))!="http://") or ($this->urlcheck->check($trim_value)))
return '<img src="'.$trim_value.'"></img>';
else return '['.$start.']'.$value.'[/'.$end.']';
}
改为：
function img($start,$end,$value){
$trim_value=trim($value);
if ((strtolower(substr($trim_value,0,7))!="http://") or ($this->urlcheck->check($trim_value)))
{
$pisces=explode(" ",$start);
if(!is_int($pisces[1]) !!is_int($pisces[2]))
return '<img src="'.$trim_value.'" width=$pisces[1] height=$pisces[2]></img>';
else
return '<img src="'.$trim_value.'"></img>';
}
else return '['.$start.']'.$value.'[/'.$end.']';
}
但由于对前面的正则表达式不熟悉没成功。
