Events.php on method $callable parameter accepts only callable

[d4mn]

---

name: Bug report
about: Help us improve the framework by reporting bugs!

---

Describe the bug
All these methods:

• Events::on('create', 'myFunction'); // procedural function
• Events::on('create', ['myClass', 'myMethod']); // Class::method
• Events::on('create', [$myInstance, 'myMethod']); // Method on an existing instance
  Throws an error because argument $callable in function public static function on($event_name, callable $callback, $priority = EVENT_PRIORITY_NORMAL) must be of type callable string and array throws an error

CodeIgniter 4 version
Codeigniter 4 beta 1

Affected module(s)
Events.php

Expected behavior, and steps to reproduce if appropriate
method should not be strict checked in functions attribute

Context

• OS: Debian
• Web server nginx 1.15
• PHP version v7.3.2

[d4mn]

I tried to look deeper into this and found this article https://wiki.php.net/rfc/consistent_callables First example of problem i think is it

[bangbangda]

I tested it, is OK. @d4mn

$testEvent = new \App\Libraries\TestEvent();
Events::on('pre_system', [$testEvent, 'hello']);

class TestEvent
{
    public function hello()
    {
        log_message('debug', 'TestEvent hello....');
        return true;
    }
}

[atishhamte]

Is it working as expected?