PHP Add Days To Date

Question

Alright, so I'm working on a licensing system, and I'm very new to working with PHP. I'd like to retrieve the number of days a license key has, then add that to the current day. My code,

$expire = $tags['exp_time']; //EXPIRATION_DATE_DAYS
$expDate = date('Y-m-d H:i:s');
$expDate = strtotime($expDate);
$expDate = $expDate + ((24 * 60 * 60)*($expire));
$expDate = date('Y-m-d H:i:s', $expDate);

I can retrieve the number of days just fine by the way, it's just creating the timestamp in a DATE-TIME format.

Any help/suggestions will greatly be appreciated. I've also tried,

date_modify(...)

John Conde · Accepted Answer · 2013-11-24 01:27:51Z

2

This is easy using DateTime()

$date = new DateTime();                  // Create datetime object representing now
$date->modify("+ $expires days");        // Add $expires days to it
$expDate = $date->format("Y-m-d H:i:s"); // Format it

If you're running PHP 5.4+ you can shorten it to a one-liner:

$expDate = (new DateTime())->modify("+ $expires days")->format("Y-m-d H:i:s");

FYI, this code:

$expDate = date('Y-m-d H:i:s');
$expDate = strtotime($expDate);

can be written as:

$expDate = time();

time() returns the current unix timestamp which is all strtotime(date('Y-m-d H:i:s')) does.

edited Nov 24, 2013 at 1:27

answered Nov 24, 2013 at 1:21

John Conde

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Gras Double · Accepted Answer · 2013-11-24 01:44:45Z

2

Another one-liner, using Carbon:

$expDate = Carbon::now()->addDays($expire)->toDateTimeString();

answered Nov 24, 2013 at 1:44

Gras Double

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zsaat14 · Accepted Answer · 2013-11-24 01:21:17Z

0

You can add days to a date using this code:

$ExpDate = date("Y-m-d g:i:s", strtotime("+".$expire." day", date("Y-m-d g:i:s")));

Make sure $expire is a of type int. This code will return the date when the license expires.

answered Nov 24, 2013 at 1:21

zsaat14

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