PHP：我可以在类中声明变量时影响类型吗？

Question

I would declare a private var in my class with a specific type like this :

class MyClass
{
    private (int) $myvar;
    private (MyObject) $instance;

    function __construct()
    {
        $this->myvar = 2;
        $this->instance = new MyObject;
    }
}

But it doesn't work and it seems there is no way to do what I want.

Answer 1

No need of type Casting. do like this

class MyClass
{
    private $myvar;
    private $instance;

    function __construct()
    {
        $this->myvar = 2;
        $this->instance = new MyObject;
    }
}