note 79235 added to function.array

Here are shorter versions of sam barrow's functions. From a PHP perspective these are O(1) (without getting into what's going on in the interpreter), instead of O(n). <?php function randomKey(array $array) { return randomElement(array_keys($array)); } function randomElement(array $array) { if (count($array) === 0) { trigger_error('Array is empty.', E_USER_WARNING); return null; } $rand = mt_rand(0, count($array) - 1); $array_keys = array_keys($array); return $array[$array_keys[$rand]]; } ?> ---- Server IP: 208.69.120.35 Probable Submitter: 70.190.176.4 ---- Manual Page -- http://www.php.net/manual/en/function.array.php Edit -- https://master.php.net/note/edit/79235 Del: integrated -- https://master.php.net/note/delete/79235/integrated Del: useless -- https://master.php.net/note/delete/79235/useless Del: bad code -- https://master.php.net/note/delete/79235/bad+code Del: spam -- https://master.php.net/note/delete/79235/spam Del: non-english -- https://master.php.net/note/delete/79235/non-english Del: in docs -- https://master.php.net/note/delete/79235/in+docs Del: other reasons-- https://master.php.net/note/delete/79235 Reject -- https://master.php.net/note/reject/79235 Search -- https://master.php.net/manage/user-notes.php