PHP - 从现在起X小时后获取时间戳[重复]

Question

This question already has an answer here:

• php string in a date format, add 12 hours 4 answers

I'd like to take a number of hours imputed in a text box and get a timestamp back so I can create a countdown timer.

The countdown is fine so ignore how that is done etc. But whats the best way to get a timestamp '48' hours from now. For example user has entered 48?

</div>

Answer 1

$hours = 48;
$timestamp = (new DateTime())->modify("+{$hours} hours")->format('U');