... 3.0.13 - 3.0.18 only, PHP 4 >= 4.0.0) krsort -- Sort an array by key in reverse order . int krsort ( array array [, int sort_flags]) . ... Example 1. krsort() example . fruits = array ("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); krsort ($fruits); reset ($fruits); while (list ($key, $val) = each ($fruits)) { echo "$key = $val\n"; } . ... d = lemon c = apple b = banana a = orange . ... See also asort() , arsort() , ksort() , sort() , natsort() , and rsort() . ... key . ... ksort ...