note 126954 added to function.array-map

A general solution for the problem of wanting to know the keys in the callback, and/or retain the key association in the returned array: <?php /** * Like array_map() but callback also gets passed the current key as the * first argument like so: * function($key, $val, ...$vals) { ... } * ...and returned array always maintains key association, even if multiple * array arguments are passed. */ function array_map_assoc(callable $callback, array $array, array ...$arrays) { $keys = array_keys($array); array_unshift($arrays, $keys, $array); return array_combine($keys, array_map($callback, ...$arrays)); } ?> Because it uses array_map() directly, it behaves the same way in regard to ignoring the keys of subsequent array arguments. It also has the same variadic signature. ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 60.231.232.99) ---- Manual Page -- https://php.net/manual/en/function.array-map.php Edit -- https://main.php.net/note/edit/126954 Del: integrated -- https://main.php.net/note/delete/126954/integrated Del: useless -- https://main.php.net/note/delete/126954/useless Del: bad code -- https://main.php.net/note/delete/126954/bad+code Del: spam -- https://main.php.net/note/delete/126954/spam Del: non-english -- https://main.php.net/note/delete/126954/non-english Del: in docs -- https://main.php.net/note/delete/126954/in+docs Del: other reasons-- https://main.php.net/note/delete/126954 Reject -- https://main.php.net/note/reject/126954 Search -- https://main.php.net/manage/user-notes.php