- var_export: documentation ( source)
- usort: documentation ( source)
<?php
$array = [
'2022-06-30',
'2022-04-20',
'2021-04-07',
'2022-09-09',
'2022-03-08',
'2021-08-07',
'2022-10-12'
];
$today = '2022-06-02'; // date('Y-m-d');
usort($array, fn($a, $b) => ($a > $today && $b > $today ? -1 : 1) * ($a <=> $b));
var_export($array);