ksort Sort an array by key intksort arrayarray intsort_flags Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays. "lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); ksort ($fruits); reset ($fruits); while (list ($key, $val) = each ($fruits)) { echo "$key = $val\n"; } ]]> This example would display: 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.