Allow all callables for extend view

[zaxxo]

This allows all callables (e.g. anonymous functions and not only global functions) to extend a view.

[lianglee]

Thanks will merge it soon!

[lianglee]

Allow all callables for extend view. We need to make sure hook and callbacks are function exists not is_callable because we need to unregister them and I am not sure if it is possible to unregister anonymous functions.

[zaxxo]

If you have a reference to the anonymous function then an unset is possible:

$fnc = fn($hook, $type, $return, $params) => 'foo';
ossn_add_hook('profile', 'edit:section', $fnc);
ossn_unset_hook('profile', 'edit:section', $fnc); // This is possible

But if you have no reference to the anonymous function then an unset is not possible:

ossn_add_hook('profile', 'edit:section', fn($hook, $type, $return, $params) => 'foo');
ossn_unset_hook('profile', 'edit:section', ???); // This is not possible

So if a developer needs to unregister an hook then he can't register the hook with an anonymous function.

[lianglee]

Thanks for sharing , I think I will leave as it is and let others developers use the anonymous functions in the hooks if they want. Added you to the contributors list now.