php - 这段代码，哪位大神，帮我解读下。谢谢-PHP中文网问答

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

$taste = empty($_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']);