note 116643 deleted from function.array-walk-recursive by salathe

Note Submitter: php dot net at askmarcos dot com ---- This how I use array_walk_recursive() to implement array_flatten() that actually preserves keys, if they are provided inside the incoming parameter: static public function array_flatten($inObj) { $outObj = []; $inObj=[$inObj]; // Thanks to which nonArray param is also welcome here. array_walk_recursive($inObj, function ($incell, $inkey) use (&$outObj) { $outObj[$inkey] = $incell; } ); return $outObj; } Note that you are responsible for ensuring that the keys in $inObj are globally unique (and either string or int type), otherwise, I don't know the worst that can happen. Probably later elements overwrite earlier ones having the same key name, rather than appending to the final $outObj to return.