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<?php
$date = new DateTime('00:12:00');
$date->sub(new DateInterval('PT1H'));
echo $date->format('h:i:s') . "\n";

Success #stdin #stdout 0.01s 83904KB

stdin

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Standard input is empty

stdout

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11:12:00

https://ideone.com/X6idx6

language:

PHP (php 7.3.5)

created:

visibility:

public

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