How to add 30 days to the date?

Get a date that way
$date = date("Y. m.d");
As to this date to add 30 days to the variable date2 for example was equal to today's date +30 days in advance?
March 19th 20 at 08:58
1 answer
March 19th 20 at 09:00
Good morning.
echo date("Y. m.d", strtotime('+30 day'));

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