<?php
$date1 = new DateTime("now");
$diff = date_diff($date1, $date2);
echo $diff->format('%R%a days');
PD9waHAKCiRkYXRlMSA9IG5ldyBEYXRlVGltZSgibm93Iik7CiRkYXRlMiA9IGRhdGVfY3JlYXRlKCcyMDE0LTEyLTEwJyk7CgokZGlmZiA9IGRhdGVfZGlmZigkZGF0ZTEsICRkYXRlMik7CgplY2hvICRkaWZmLT5mb3JtYXQoJyVSJWEgZGF5cycpOw==