面向对象的编程访问变量值，如何？

Question

I am a learner, I have a class db to help me connect and fetch results in mySQL.

$set = $db->get_row("SELECT * FROM users");
echo $set->name;

this way i use echo results outside a class.

Now i have created another class name user and it has this function

public function name() {
            global $db;
            $set = $db->get_row("SELECT * FROM users");
            $this->name = $set->name;
    }

after initializing the class user, when i try to echo $user->name i dont get expected results.

Note i have declared above var $name; in class user

Answer 1

class DB
{
    public function get_row($q)
    {
        # do query and store in object
        return $object;
    }
}

class User
{
    public $name;

    public function __construct()
    {
        $this->name();
    }

    public function name() {
        global $db;
        $set = $db->get_row("SELECT * FROM users");
        echo "<pre>".print_r($set)."</pre>"; # make sure $set is returning what you expected.
        $this->name = $set->name;
    }
}

$db = new DB();
$user = new User();
echo $user->name;