参数：$birth_year：出生年份；$birth_month：出生月份；$birth_day：出生日
function getAgeByBirth($birth_year,$birth_month,$birth_day){
if(empty($birth_year) || empty($birth_month) || empty($birth_day)){
return 0;
}
$current_year = date('Y',time());
$current_month = date('m',time());
$current_day = date('d',time());
if($birth_year >= $current_year){
return 0;
}
$age = $current_year - $birth_year - 1;
if($current_month>$birth_month){
return $age+1;
}else if($current_month == $birth_month && $current_day>=$birth_day){
return $age+1;
}else{
return $age;
}
}
——现在的努力，只为小时候吹过的牛逼！ ——
Original: https://www.cnblogs.com/zxf100/p/16400456.html
Author: 下页、再停留
Title: PHP 通过两个日期计算年龄
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