<?php
$a = new DateTime("2017-11-17 22:05:26.000000", new DateTimeZone('UTC'));
$b = new DateTime("2017-04-03 22:29:15.079459", new DateTimeZone('UTC'));
$diff = $a->diff($b);
var_dump($diff->h);
// Africa/Nairobi has no DST
$a = new DateTime("2017-11-17 22:05:26.000000", new DateTimeZone('Africa/Nairobi'));
$b = new DateTime("2017-04-03 22:29:15.079459", new DateTimeZone('Africa/Nairobi'));
$diff = $a->diff($b);
var_dump($diff->h);
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
int(23)
int(23)