How did he get around registering the 10-character limit?

How did he get around the registration 10 character limit???
I see a lot of spaces ...
But the normal input space does not make sense to succeed.

There are enthusiasts to help me find out why.
Link Address
http://bbs.youyax.com/Content-5511

On the wording of the filter

Public Function transform ($txt)
    {
        $txt = Trim ($txt);
        $txt = Addslashes (Htmlspecialchars ($txt, Ent_quotes, "UTF-8"));
        if (Preg_match_all ("/\
 
 
  
  Quote:
  
  
 

  
   
   (. +?) \[\/quote]/is ", $txt, $match)) {
   
   
  
            $txt = preg_replace ('/\s*\r\n\s*/', ', $txt, 1);
   
   
  
        }
   
   
  
        $huanhang = Array (
   
   
  
            "\ r \ n",
   
   
  
            "\ n",
   
   
  
            "\ r"
   
   
  
        );
   
   
  
        $txt      = Str_replace ($huanhang, '
   
   
  
', $txt);
  
  
 
 
 

------Solution--------------------
Picture display: There is a blank between the text and the ellipsis
Even the browser is not considered to be half-width space, you still \s what use?

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