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<?php $arr = array("D"=>"dog","a"=>"cat","A"=>"moose","d"=>"mouse"); ksort($arr, $sort_flags=SORT_FLAG_CASE); var_dump($arr);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.24, 7.4.0 - 7.4.13, 8.0.0
array(4) { ["A"]=> string(5) "moose" ["D"]=> string(3) "dog" ["a"]=> string(3) "cat" ["d"]=> string(5) "mouse" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Notice: Use of undefined constant SORT_FLAG_CASE - assumed 'SORT_FLAG_CASE' in /in/kV21S on line 6 Warning: ksort() expects parameter 2 to be long, string given in /in/kV21S on line 6 array(4) { ["D"]=> string(3) "dog" ["a"]=> string(3) "cat" ["A"]=> string(5) "moose" ["d"]=> string(5) "mouse" }