如何在类之外回显变量，从类中传递函数

I have a php code. my code is like this
class Connection {
function connect(){
$link = 'Connected';
}
}

$con = new Connection();
$con -> connect();
echo $con->link;//connected
here i want to echo the variable but it is not getting Help me

You will have to return a value, like this:

function connect() {
    return 'Connected';
}