Deadline Days Left
<?php
$deadline = new DateTime('+5 days');
$now = new DateTime('now');
echo $deadline->diff($now)->d . PHP_EOL;
echo $now->diff($deadline)->d . PHP_EOL;INFO
<?php
$deadline = new DateTime('+5 days');
$now = new DateTime('now');
echo $deadline->diff($now)->d . PHP_EOL;
echo $now->diff($deadline)->d . PHP_EOL;