php - getting date time using DateTime return different value from date() function

Question

I am trying to get the current timestamp using Carbon or DateTime Class I get wrong date but when I use date() function it return the correct date I run the code on win server 2012 this is my code

dd([
    'Carbon::now()->format("Y-m-d H:i:s P")' => Illuminate\Support\Carbon::now()->format('Y-m-d H:i:s P'), 
    'DateTime()->format("Y-m-d H:i:s P")' => (new DateTime())->format('Y-m-d H:i:s P'), 
    'date("Y-m-d H:i:s P")' => date('Y-m-d H:i:s P'),
    'date("Y-m-d H:i:s P",microtime(true))' => date("Y-m-d H:i:s P", microtime(true)),
    'date("Y-m-d H:i:s P", time())' => date("Y-m-d H:i:s P", time()),
    'Carbon::now()->getTimestamp()' => Illuminate\Support\Carbon::now()->getTimestamp(),
    'microtime()' => microtime(true),
    'time()' => time(),
]);

this is the output that I got

[
  "Carbon::now()->format("Y-m-d H:i:s P")" => "2018-06-25 22:41:59 +03:00"
  "DateTime()->format("Y-m-d H:i:s P")" => "2018-06-25 22:41:59 +03:00"
  "date("Y-m-d H:i:s P")" => "2018-06-19 11:59:22 +03:00"
  "date("Y-m-d H:i:s P",microtime(true))" => "2018-06-25 22:41:59 +03:00"
  "date("Y-m-d H:i:s P", time())" => "2018-06-19 11:59:22 +03:00"
  "Carbon::now()->getTimestamp()" => 1529955719
  "microtime()" => 1529955719.4257
  "time()" => 1529398762
]

the server time is the same as the value of date function

Sebastian

Hi, are you doing this on a local server, if so have you checked the server date time? – Missi

its not on local server – Sebastian

have you tried with: $dt = Carbon::now(); and then use Carbon::createFromFormat('Y-m-d H', $dt)->toDateTimeString(); – Rubicund

it cause Trailing data exception – Sebastian

probably a formatting issue; what if you run "Y-m-d H:i:s P" without the P, i.e. "Y-m-d H:i:s" – Rubicund

P used to show +03:00 – Sebastian

date("Y-m-d H:i:s P", microtime(true))returns exact time DateTime() does. Is it wrong? – Erethism

date("Y-m-d H:i:s P", microtime(true)) return wrong date as will as the DateTime class – Sebastian

Altogether it seems that the problem may be due to and old bug with monotonic value of world time (jamie comment at php.net/manual/ru/function.microtime.php). Can you check what he’s saying and if it applies to your server? – Dorcia

Try to clear cache and then try again. – Immodest

Answer 1

This is a configurations issue. You have 2 ways to get UNIX-timestamp at PHP: microtime(true) and time(). Carbon and DateTime are using microtime(true) internally.

Here are some details referring to their implementation: https://mcmap.net/q/1473552/-php-time-and-microtime-do-sometimes-not-concord

Einkorn

The information in the linked answer is awesome but... Can this explain a 6-day difference? (This is an honest question!) – Belshazzar

@ÁlvaroGonzález It's hard to debug without code and environment. I think it's a bug in PHP for Windows Server 2012. We can trace microtime() to function get_time_func: lxr.room11.org/xref/php-src%40master/win32/time.c#33 Here you can see special if statement for Windows Server 2012 and Windows 8, looks like it has a bug or something like this. If you can reproduce it would be helpful to report it at bugs.php.net – Einkorn

Answer 2

Have you tried setting the timezone at the top of the script? You might be running into a session vs server timezone issue:

date_default_timezone_set ('whatevertimezone');

Historiographer

I do not think the timezone is the problem because timezone will change the time not the date 2018-06-19 - 2018-06-25 as shown in the question despite that I tried to change the timezone the problem still appear – Sebastian

Answer 3

can you try using

Carbon::today() 

instead of using Carbon::now. It works for me .

Uganda

if I want another way to get the correct date I can use date function but I have to fix the problem because each package uses DateTime or Carbon Class will get wrong date – Sebastian