[PHP 7] Call protected method with Closure proxy

call_protected_method.php

<?php

class Foo
{
    protected function bar($param)
    {
        var_dump($param);
    }
}

$param = 'Text param';

$instance = new Foo();

$proxy = function () use ($instance, $param) {
    $instance->bar($param);
};
$proxy->call($instance);