note 116478 added to function.array-filter

If you want to pass the key to the callback function before PHP 5.6.0 (when the flag parameter wasn't implemented): <?php $result = array_filter(array_keys($array), 'is_int'); ?> ---- Server IP: 72.52.91.14 Probable Submitter: 80.97.67.161 ---- Manual Page -- http://php.net/manual/en/function.array-filter.php Edit -- https://master.php.net/note/edit/116478 Del: integrated -- https://master.php.net/note/delete/116478/integrated Del: useless -- https://master.php.net/note/delete/116478/useless Del: bad code -- https://master.php.net/note/delete/116478/bad+code Del: spam -- https://master.php.net/note/delete/116478/spam Del: non-english -- https://master.php.net/note/delete/116478/non-english Del: in docs -- https://master.php.net/note/delete/116478/in+docs Del: other reasons-- https://master.php.net/note/delete/116478 Reject -- https://master.php.net/note/reject/116478 Search -- https://master.php.net/manage/user-notes.php