我想创建日期验证但不知道为什么返回是假的？

Question

i want create date validation but not know why return is false?

$data_go = '2011/04/28';
$ddmmyyy='(0[1-9]|[12][0-9]|3[01])[- \/.](0[1-9]|1[012])[- \/.](19|20)[0-9]{2}';
            if(preg_match("/$ddmmyyy$/", $data_go)) {
               return TRUE;
            }else {
              return FALSE;
            }

Answer 1

Because your date is yyyy/mm/dd, while your Regex is dd/mm/yyyy.