- var_dump: documentation ( source)
<?php
$deliveryDateFrom = new DateTime('2015-09-20');
$actualDate = new DateTime('2015-09-10');
var_dump($actualDate >= $deliveryDateFrom->sub(new DateInterval($this->interval)));
$deliveryDateFrom = new DateTime('2015-09-20');
$actualDate = new DateTime('2015-09-01');
var_dump($actualDate >= $deliveryDateFrom->sub(new DateInterval($this->interval)));
$deliveryDateFrom = new DateTime('2015-09-20');
$actualDate = new DateTime('2015-09-20');
var_dump($actualDate >= $deliveryDateFrom->sub(new DateInterval($this->interval)));
$deliveryDateFrom = new DateTime('2015-09-20');
$actualDate = new DateTime('2015-09-30');
var_dump($actualDate >= $deliveryDateFrom->sub(new DateInterval($this->interval)));