note 108153 added to function.array-keys

It should be noted that the inverse function to keys (which converts keys to values) is array_count_values (which converts values to keys). This is needed to use things like array_intersect_key. Could go in several places. Took me a while to figure it out. ---- Server IP: 69.147.83.197 Probable Submitter: 118.208.46.91 ---- Manual Page -- http://www.php.net/manual/en/function.array-keys.php Edit -- https://master.php.net/note/edit/108153 Del: integrated -- https://master.php.net/note/delete/108153/integrated Del: useless -- https://master.php.net/note/delete/108153/useless Del: bad code -- https://master.php.net/note/delete/108153/bad+code Del: spam -- https://master.php.net/note/delete/108153/spam Del: non-english -- https://master.php.net/note/delete/108153/non-english Del: in docs -- https://master.php.net/note/delete/108153/in+docs Del: other reasons-- https://master.php.net/note/delete/108153 Reject -- https://master.php.net/note/reject/108153 Search -- https://master.php.net/manage/user-notes.php