PHP：在字符串中显示静态变量

Question

如何在字符串中显示“静态变量”：类似这样的

class test
{
    public static $static_var = 10;
    public function name()
    {
        echo "You have {self::$static_var}"; //You have 10
    }
}

也尝试过：echo "You have {${self::$static_var}}"; 但似乎也没有用，

我知道密切引用：echo "You have ".self::$static_var; 但是有没有办法用括号“{}”？