php7中構造函數和析構函數的用法
初始化對象時候，給傳值進去
class Person{
public $name;
public $age;
public function __construct($n,$b){
$this->name=$n;
$this->age=$b;}
public function say(){
echo $this->age;}
public function __destruct(){
echo '96net.com.cn';}
}
$xm=new Person('11','22');
$xm->say();