[Basic PHP] Treat function or method call as an array?

[eluser]janogarcia[/eluser]
Thank you noctrum for the fast reply.

(the snippet I posted is not actual production code, it was an illustrative example, I could have used the config_item() helper function of Common.php to the same effect: $array = config_item('some_array'); $index = config_item('some_index');...)