- Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.31, 7.1.0 - 7.1.21, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- int(28)
<?php
$dob = new \DateTime('28-07-1987');
var_dump($dob->diff(new \DateTime())->y);