note 130024 added to function.in-array

So still the best and the easiest is foreach loop in case of arrays in array.... function check_all_keys($haystack) { foreach ($haystack as $key => $value) { if (!is_array($value)) { } else { check_all_keys($value); } } } ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 89.24.217.207) ---- Manual Page -- https://php.net/manual/en/function.in-array.php Edit -- https://main.php.net/note/edit/130024 Del: integrated -- https://main.php.net/note/delete/130024/integrated Del: useless -- https://main.php.net/note/delete/130024/useless Del: bad code -- https://main.php.net/note/delete/130024/bad+code Del: spam -- https://main.php.net/note/delete/130024/spam Del: non-english -- https://main.php.net/note/delete/130024/non-english Del: in docs -- https://main.php.net/note/delete/130024/in+docs Del: other reasons-- https://main.php.net/note/delete/130024 Reject -- https://main.php.net/note/reject/130024 Search -- https://main.php.net/manage/user-notes.php