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@ 2024-03-21T16:11:21Z

<?php

$distance = -10;
$dt = new DateTimeImmutable('2024-03-21 12:00:00');

var_dump($dt->modify("-{$distance} hours"));
var_dump($dt->modify((-$distance) . " hours"));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

87.16 ms | 863 KiB | 5 Q