PHP ⽉ the simplest way to add and subtract ⽅

from PHP5.3 Start , date Added ⼀ Series of correction phrases , To make it clear , That's it ”first day of” and “last day of”,

as follows ：

 

Month minus one    |  Month plus one

$month = date("Y-m-d", strtotime("last day of -1 month", strtotime("2022-07-25")));

$month = date("Y-m-d", strtotime("first day of +1 month", strtotime("2022-07-25")));