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<?php $foo = array( 'a' => '1', 'b' => 1, 'c' => 1, '1' => '2', 1 => 2, ); var_dump($foo); function change_keys($array, $callback) { return array_combine(array_map($callback, array_combine(array_keys($array), array_keys($array))), $array); } var_dump(change_keys($foo, 'test')); function test($v) { return '#' . $v; }
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { ["a"]=> string(1) "1" ["b"]=> int(1) ["c"]=> int(1) [1]=> int(2) } array(4) { ["#a"]=> string(1) "1" ["#b"]=> int(1) ["#c"]=> int(1) ["#1"]=> int(2) }

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