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<?php $ar = array('a' => 'b'); function cb($v) { return $v; } print_r(array_map('cb', $ar)); print_r(array_map('cb', $ar, array_keys($ar)));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [a] => b ) Array ( [0] => b )