这代码要怎么理解
class Topic extends User{
public function __construct($registry) {
$this->db = $registry->get('db');
$this->sysFun=$registry->get('funcSysten');
$this->session = $registry->get('session');
}我对类,面向对象只有粗浅的了解。像这个$this->sysFun=$registry->get('funcSysten')像这个
$registry->get('funcSysten');这个值怎么理解?
有什么意义?求大神指教
看例子:
$some=new Topic extends User();
$some->db就是$this->db