Online PHP editor | output for 3n7Vm

@ 2018-10-31T12:41:27Z

<?php

$dtz = new DateTimeZone('Europe/Moscow');
$date = new DateTime("2018-11-14 00:00:00", $dtz);
$tieme_from = new DateTime("1970-01-01 15:00:00", $dtz);
$tieme_to = new DateTime("1970-01-01 16:00:00", $dtz);

$date_from = new DateTime(
    $date->format('Y-m-d')
    . ' '
    . $tieme_from->format('H:i:sP')
    , 
    $dtz
);

echo $date_from->format('Y-m-d H:i:sP') . "\n";
echo $date_from->getTimestamp();

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.3.4, 8.3.6: 2018-11-14 15:00:00+03:00 1542196800
Output for 8.3.5: 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 2018-11-14 15:00:00+03:00 1542196800

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