// 회원 생년월일 나이로 변환
$birth = substr($member['mb_birth'],0,4) . "-" . substr($member['mb_birth'],4,2)  . "-" . substr($member['mb_birth'],6,2);
$birth_time   = strtotime($birth);
$now          = date('Y');
$birthday     = date('Y' , $birth_time);
$age           = $now - $birthday + 1 ;