- var_dump: documentation ( source)
<?php
$date = new DateTime();
$navDays = [
'-7Days' => (clone DateTime())->modify('-7 days')->format('Y-m-d'),
'-1Day' => (clone DateTime())->modify('-1 days')->format('Y-m-d'),
'Today' => (clone DateTime())->format('Y-m-d'),
'+1Day' => (clone DateTime())->modify('+1 days')->format('Y-m-d'),
'+7Days' => (clone DateTime())->modify('+7 days')->format('Y-m-d')
];
var_dump($navDays);