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<?php $array = [ 1 => [ 1 => [ 'anna', 'alice' ], 2 => [ 'bob', 'bartold' ] ], 2 => [ 1 => [ 'carol' ], 2 => [ 'david' ] ] ]; $result = []; array_walk_recursive($array, function ($value, $key) use (&$result) { if (!is_array($value)) { $result[$key][] = $value; } }); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> array(4) { [0]=> string(4) "anna" [1]=> string(3) "bob" [2]=> string(5) "carol" [3]=> string(5) "david" } [1]=> array(2) { [0]=> string(5) "alice" [1]=> string(7) "bartold" } }

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