PHP Manual . ... PHP 3 <= 3.0.18, PHP 4 >= 4.0.0) arsort -- Sort an array in reverse order and maintain index association . void arsort ( array array [, int sort_flags]) . ... This is used mainly when sorting associative arrays where the actual element order is significant. Example 1. arsort() example . fruits = array ("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple"); arsort ($fruits); reset ($fruits); while (list ($key, $val) = each ($fruits)) { echo "$key = $val\n"; } . ...