<?php
$birthday="10/10/1905";
$now=new DateTime();
$birthtime=new DateTime($birthday);
$interval = $now->diff($birthtime);
echo $interval->format("Сейчас ему %Y лет\n");
PD9waHAKJGJpcnRoZGF5PSIxMC8xMC8xOTA1IjsKJG5vdz1uZXcgRGF0ZVRpbWUoKTsKJGJpcnRodGltZT1uZXcgRGF0ZVRpbWUoJGJpcnRoZGF5KTsKJGludGVydmFsID0gJG5vdy0+ZGlmZigkYmlydGh0aW1lKTsKZWNobyAkaW50ZXJ2YWwtPmZvcm1hdCgi0KHQtdC50YfQsNGBINC10LzRgyAlWSDQu9C10YJcbiIpOwo=