function ordenaMeses($ref) {
uksort($ref, function ($a, $b) {
return DateTime::createFromFormat('d/m', $a) >= DateTime::createFromFormat('d/m', $b);
});
return $ref;
}
ou
function ordenaMeses(&$ref) {
uksort($ref, function ($a, $b) {
return DateTime::createFromFormat('d/m', $a) >= DateTime::createFromFormat('d/m', $b);
});
}