Frage 4.

a:5:{s:8:"nonsense";s:15:"this is no hint";s:18:"even_more_nonsense";s:34:"will not lead you anywhere, either";s:23:"this_might_be_something";s:52:"use the appropriate function on the next keys value!";s:36:"now_this_is_really_interesting_stuff";s:112:"aHR0cDovL2Jpc3QtZHUuZGVyLWJlc3RlLmluL3dlYmVudHdpY2tsdW5nL2Jhc2U2NC1lbmNvZGUtYmVudXR6ZS1pY2gtamVkZW4tdGFnLmh0bWw=";s:37:"back_to_some_meaningless_dummy_values";s:43:"that are only here to distract you a little";}