How to get previous days or next days in PHP?

Using strtotime function, we can achieve this. Let’s take a look at the function first.

strtotime

Parses an English textual datetime description into a Unix timestamp.

Syntax

strtotime ( string $time [, int $now = time() ] ) : int

The function expects to be given a string containing an English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now(), or the current time if now() is not supplied.

Each parameter of this function uses the default time zone unless a time zone is specified in that parameter. Be careful not to use different time zones in each parameter unless that is intended. 

Parameters

time: A date/time string.

now: The timestamp which is used as a base for the calculation of relative dates.

Let's come to the main question:

Use this to get previous date:

date('Y/m/d',strtotime("-1 days"));

Just increase or decrease the days to get the desired date.

To get next date, use this:

date('Y/m/d',strtotime("+1 days"));

OR even simple:

echo date('Y-m-d',strtotime("yesterday"));
echo date('Y-m-d',strtotime("tomorrow"));

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