ksort Sort an array by key boolksort arrayarray intsort_flags Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays. &return.success; "lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); ksort($fruits); foreach ($fruits as $key => $val) { echo "$key = $val\n"; } ?> ]]> &example.outputs; You may modify the behavior of the sort using the optional parameter sort_flags, for details see sort. See also asort, arsort, krsort, uksort, sort, natsort, and rsort. The second parameter was added in PHP 4.