Access a static variable by $var::$reference

Question

I am trying to access a static variable within a class by using a variable class name. I\'m aware that in order to access a function within the class, you

Answer 1

Have you try this?

class foo {
    static public $bar = "Hi";

    static public function bar() {
        echo "Hi";
    }
}

echo foo::$bar; // Output: Hi
foo::bar(); // Output: Hi

$class = "foo";
echo $class::$bar; // Output: Hi
$class::bar(); // Output: Hi
call_user_func($class, 'bar'); // Output: Hi