Use the strtotime function to calculate a date

In the past, when I was working on a project, I met a requirement. It is known that the birthday of a pet is. The pet will drive the worm once every three months, prompting the user to give the pet the next time.

The following is a method I want to use. It is easy to use the strtotime function. In fact, PHP functions are actually very powerful!

<? Php $ birthday = strtotime ('2017-08-03 '); while (time ()> $ birthday) {$ birthday = strtotime (' + 3 months', $ birthday );} echo date ('Y-m-d', $ birthday );

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