- Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
- string(1) "+"
<?php
$d1 = new \DateTime('2017-01-01');
$d2 = new \DateTime('2017-07-01');
var_dump($d1->diff($d2, true)->format('%R'));