PHP添加日期至今

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(...)

Answer 1

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('Ymd H:i:s')) does.

Answer 2

另一种使用Carbon的划线：

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

Answer 3

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.