[ref/REGEXP] PHP pcre 패턴 검증용 ref. links

1. 온라인
   

   http://www.roblocher.com/technotes/regexp.aspx
   http://www.gskinner.com/RegExr/

   
   
2. 오프라인
   

   http://notes.textcube.com/4
   http://laurent.riesterer.free.fr/regexp/ (no install, portable)
   http://weitz.de/regex-coach/ (installable)