<?php

$correct = array();

$i = 10;
while (--$i) {
    $wrong[$i] = "wrong";
    $correct[$i] = "correct";
}

print_r($wrong);
print_r($correct);

?>

Array
(
    [9] => wrong
    [8] => wrong
    [7] => wrong
    [6] => wrong
    [5] => wrong
    [4] => wrong
    [3] => wrong
    [2] => wrong
    [1] => wrong
)
Array
(
    [9] => correct
    [8] => correct
    [7] => correct
    [6] => correct
    [5] => correct
    [4] => correct
    [3] => correct
    [2] => correct
    [1] => correct
)