这段代码，哪位大神，帮我解读下。谢谢

$age = empty($_POST['age'])?1:trim($_POST['age']);

<code>$taste = empty($_POST['taste'])?1:trim($_POST['taste']);
$drink = empty($_POST['drink'])?0:trim($_POST['drink']);
$drink_quantity = empty($_POST['drink_quantity'])?0:trim($_POST['drink_quantity']);
$potation = empty($_POST['potation'])?0:trim($_POST['potation']);
$coffee = empty($_POST['coffee'])?0:trim($_POST['coffee']);
$smoke = empty($_POST['smoke'])?0:trim($_POST['smoke']);
$medicine_type = empty($_POST['medicine_type'])?0:trim($_POST['medicine_type']);
$movement = empty($_POST['movement'])?0:trim($_POST['movement']);
$movement_name = empty($_POST['movement_name'])?'':trim($_POST['movement_name']);
$work = empty($_POST['work'])?0:trim($_POST['work']);
$pressure = empty($_POST['pressure'])?0:trim($_POST['pressure']);
$tired = empty($_POST['tired'])?0:trim($_POST['tired']);
$cold = empty($_POST['cold'])?0:trim($_POST['cold']);
$hands = empty($_POST['hands'])?0:trim($_POST['hands']);
$pregnant = empty($_POST['pregnant'])?0:trim($_POST['pregnant']);
$lactation = empty($_POST['lactation'])?0:trim($_POST['lactation']);
$edema = empty($_POST['edema'])?0:trim($_POST['edema']);
$edema_po = empty($_POST['edema_po']) ? 0 : trim($_POST['edema_po']);
$discomfort = empty($_POST['discomfort']) ? 0 : trim($_POST['discomfort']);
$makeup_name = empty($_POST['makeup_name']) ? '' : trim($_POST['makeup_name']);
$shaping_name = empty($_POST['shaping_name']) ? 0 : trim($_POST['shaping_name']);
$shaping = empty($_POST['shaping']) ? 0 : trim($_POST['shaping']);
$skin = empty($_POST['skin']) ? 0 : trim($_POST['skin']);
$skin_pro = empty($_POST['skin_pro']) ? array() : $_POST['skin_pro'];
$skin_pro = implode(',',$skin_pro);
$body_pro = empty($_POST['body_pro']) ? array() : $_POST['body_pro'];
$body_pro = implode(',', $body_pro);
$course = empty($_POST['course']) ? 0 : trim($_POST['course']);
$nursing_period = empty($_POST['nursing_period']) ? 0 : trim($_POST['nursing_period']);
$nursing_inter = empty($_POST['nursing_inter']) ? 0 : trim($_POST['nursing_inter']);
$treatment_cost = empty($_POST['treatment_cost']) ? 0 : trim($_POST['treatment_cost']);
$homep_roducts = empty($_POST['homep_roducts']) ? 0 : trim($_POST['homep_roducts']);</code>

回复内容：

$age = empty($_POST['age'])?1:trim($_POST['age']);

<code>$taste = empty($_POST['taste'])?1:trim($_POST['taste']);
$drink = empty($_POST['drink'])?0:trim($_POST['drink']);
$drink_quantity = empty($_POST['drink_quantity'])?0:trim($_POST['drink_quantity']);
$potation = empty($_POST['potation'])?0:trim($_POST['potation']);
$coffee = empty($_POST['coffee'])?0:trim($_POST['coffee']);
$smoke = empty($_POST['smoke'])?0:trim($_POST['smoke']);
$medicine_type = empty($_POST['medicine_type'])?0:trim($_POST['medicine_type']);
$movement = empty($_POST['movement'])?0:trim($_POST['movement']);
$movement_name = empty($_POST['movement_name'])?'':trim($_POST['movement_name']);
$work = empty($_POST['work'])?0:trim($_POST['work']);
$pressure = empty($_POST['pressure'])?0:trim($_POST['pressure']);
$tired = empty($_POST['tired'])?0:trim($_POST['tired']);
$cold = empty($_POST['cold'])?0:trim($_POST['cold']);
$hands = empty($_POST['hands'])?0:trim($_POST['hands']);
$pregnant = empty($_POST['pregnant'])?0:trim($_POST['pregnant']);
$lactation = empty($_POST['lactation'])?0:trim($_POST['lactation']);
$edema = empty($_POST['edema'])?0:trim($_POST['edema']);
$edema_po = empty($_POST['edema_po']) ? 0 : trim($_POST['edema_po']);
$discomfort = empty($_POST['discomfort']) ? 0 : trim($_POST['discomfort']);
$makeup_name = empty($_POST['makeup_name']) ? '' : trim($_POST['makeup_name']);
$shaping_name = empty($_POST['shaping_name']) ? 0 : trim($_POST['shaping_name']);
$shaping = empty($_POST['shaping']) ? 0 : trim($_POST['shaping']);
$skin = empty($_POST['skin']) ? 0 : trim($_POST['skin']);
$skin_pro = empty($_POST['skin_pro']) ? array() : $_POST['skin_pro'];
$skin_pro = implode(',',$skin_pro);
$body_pro = empty($_POST['body_pro']) ? array() : $_POST['body_pro'];
$body_pro = implode(',', $body_pro);
$course = empty($_POST['course']) ? 0 : trim($_POST['course']);
$nursing_period = empty($_POST['nursing_period']) ? 0 : trim($_POST['nursing_period']);
$nursing_inter = empty($_POST['nursing_inter']) ? 0 : trim($_POST['nursing_inter']);
$treatment_cost = empty($_POST['treatment_cost']) ? 0 : trim($_POST['treatment_cost']);
$homep_roducts = empty($_POST['homep_roducts']) ? 0 : trim($_POST['homep_roducts']);</code>

这是一段有问题的代码．．．
把empty()换成isset()...
否则会有notice...

运用三元运算符也就是语句中的 ? : ;，用empty判断是否为空

一堆变量判空，非空去空格

? : 这个操作符你去了解一下

这段代码就是从post的表单数据中获取数据
主要做了空值校验 第一行代码的意思是如果_POST数组里的taste为空 $taste变量赋1 否则为表单数据
其他代码差不多这个意思 还有就是implode是把传递过来的字符串按,分割 切割成数组

类似xx?A:B的格式叫做三目运算符

$v=empty(xxxx)?A:B

$v是一个变量
= 号是赋值符
empty(xxxx)? 相当于一个判断。empty是判断是否为空的函数
如果xxxx为空则$V的值赋值为A
如果xxxx不为空则$V的值赋值为B

反对高票答案, 原因如下: