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--TEST-- Test array_change_key_case() function : usage variations - Different strings as keys --SKIPIF-- <?php if (substr(PHP_OS, 0, 3) == 'WIN') { die("skip Output tested contains chars that are not shown the same on windows concole (ESC and co)"); } --FILE-- <?php /* Prototype : array array_change_key_case(array $input [, int $case]) * Description: Retuns an array with all string keys lowercased [or uppercased] * Source code: ext/standard/array.c */ /* * Test how array_change_key_case() behaves with different strings */ echo "*** Testing array_change_key_case() : usage variations ***\n"; $inputs = array ( // group of escape sequences array(null => 1, NULL => 2, "\a" => 3, "\cx" => 4, "\e" => 5, "\f" => 6, "\n" => 7, "\t" => 8, "\xhh" => 9, "\ddd" => 10, "\v" => 11), // array contains combination of capital/small letters array("lemoN" => 1, "Orange" => 2, "banana" => 3, "apple" => 4, "Test" => 5, "TTTT" => 6, "ttt" => 7, "ww" => 8, "x" => 9, "X" => 10, "oraNGe" => 11, "BANANA" => 12) ); foreach($inputs as $input) { echo "\n-- \$case = default --\n"; var_dump(array_change_key_case($input)); echo "-- \$case = upper --\n"; var_dump(array_change_key_case($input, CASE_UPPER)); } echo "Done"; ?> --EXPECTF-- *** Testing array_change_key_case() : usage variations *** -- $case = default -- array(10) { [""]=> int(2) ["\a"]=> int(3) ["\cx"]=> int(4) [""]=> int(5) [""]=> int(6) [" "]=> int(7) [" "]=> int(8) ["\xhh"]=> int(9) ["\ddd"]=> int(10) [""]=> int(11) } -- $case = upper -- array(10) { [""]=> int(2) ["\A"]=> int(3) ["\CX"]=> int(4) [""]=> int(5) [""]=> int(6) [" "]=> int(7) [" "]=> int(8) ["\XHH"]=> int(9) ["\DDD"]=> int(10) [""]=> int(11) } -- $case = default -- array(9) { ["lemon"]=> int(1) ["orange"]=> int(11) ["banana"]=> int(12) ["apple"]=> int(4) ["test"]=> int(5) ["tttt"]=> int(6) ["ttt"]=> int(7) ["ww"]=> int(8) ["x"]=> int(10) } -- $case = upper -- array(9) { ["LEMON"]=> int(1) ["ORANGE"]=> int(11) ["BANANA"]=> int(12) ["APPLE"]=> int(4) ["TEST"]=> int(5) ["TTTT"]=> int(6) ["TTT"]=> int(7) ["WW"]=> int(8) ["X"]=> int(10) } Done