--TEST-- Test array_keys() function (variation - 2) --SKIPIF-- --FILE-- 1, 2147483648 => 2, -2147483647 => 3, -2147483648 => 4, -2147483649 => 5, -0 => 6, 0 => 7 ); var_dump(array_keys($arr_range)); echo "\n*** Testing array_keys() on an array created on the fly ***\n"; var_dump(array_keys(array("a" => 1, "b" => 2, "c" => 3))); var_dump(array_keys(array())); // null array echo "Done\n"; ?> --EXPECT-- *** Testing array_keys() on range of values *** array(4) { [0]=> int(2147483647) [1]=> int(-2147483648) [2]=> int(-2147483647) [3]=> int(0) } *** Testing array_keys() on an array created on the fly *** array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" } array(0) { } Done