PHP - YY/MM/DD 날짜형식 정규표현식

정규표현식 "04/2/29 | 2002-4-30 | 02.10.31"에는 매치되나 "2003/2/29 | 02.4.31 | 00/00/00"에는 매치되지 않습니다.

 ^(?:(?:(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00)))(\/|-|\.)(?:0?2\1(?:29)))|(?:(?:(?:1[6-9]|[2-9]\d)?\d{2})(\/|-|\.)(?:(?:(?:0?[13578]|1[02])\2(?:31))|(?:(?:0?[1,3-9]|1[0-2])\2(29|30))|(?:(?:0?[1-9])|(?:1[0-2]))\2(?:0?[1-9]|1\d|2[0-8]))))$

출처: http://www.regexlib.com