CODEWITHSUNDEEP
phpdatephp-carbon
allisius
allisius

Reputation: 415

Carbon addWeeks() function not working

I am creating some dates with Carbon in PHP, but I seem to be doing something wrong.

This here is my code:

$start = Carbon::create(2015, rand(6,7), rand(1,30), 0);
$end = $start->addWeeks(3);

echo "start time: " . $start;
echo "<br />";
echo "end time: " . $end;

And the output of the above is two exact same dates, e.g.:

start time: 2015-07-01 00:00:00
end time: 2015-07-01 00:00:00

I reffered to the docs, which can be found here: http://carbon.nesbot.com/docs/#api-addsub. Does anybody know what am I doing wrong?

Upvotes: 5

Views: 10914

Answers (4)

fahdshaykh
fahdshaykh

Reputation: 692

because you'r not parsing date ($start) in carbon parse method,

$start = Carbon::create(2015, rand(6,7), rand(1,30), 0);
$end = Carbon::parse($start)->addWeeks(3);

i have not tested your code but hope so it work.

Upvotes: 0

Debbie V
Debbie V

Reputation: 324

Carbon dates are mutable. Try this:

$rand_date = Carbon::create(2015, rand(6,7), rand(1,30), 0);


echo "start time: " . $rand_date->format('Y-m-d');
echo "<br />";
echo "end time: " . $rand_date->addWeeks(3)->format('Y-m-d');

Upvotes: 1

m02ph3u5
m02ph3u5

Reputation: 3161

I haven't worked with Carbon yet but I'd say those Carbon object are mutable. Also most functions seem to return $this for method chaining (aka fluent interface).

Thus, when doing $end = $start->addWeeks(3); your $end is actually the same object as $start. (just an intelligent guess)

To avoid this try to either clone the object before manipulation (if possible) or create another one.

Version 1

$start = Carbon::create(2015, rand(6,7), rand(1,30), 0);
$end = clone $start;
$start->addWeeks(3);

Version 2

$start = Carbon::create(2015, rand(6,7), rand(1,30), 0);
$end = Carbon::create(2015, rand(6,7), rand(1,30), 0);
$start->addWeeks(3);

Upvotes: 8

markdwhite
markdwhite

Reputation: 2449

$end takes the same value as $start after the addition and it looks like it has not changed. But it has:

>>> use Carbon\Carbon;
=> false
>>> $start = Carbon::create(2015, rand(6,7), rand(1,30), 0);
=> Carbon\Carbon {#766
     +"date": "2015-07-16 00:00:00",
     +"timezone_type": 3,
     +"timezone": "Asia/Bangkok",
   }
>>> $end = $start->addWeeks(3);
=> Carbon\Carbon {#766
     +"date": "2015-08-06 00:00:00",
     +"timezone_type": 3,
     +"timezone": "Asia/Bangkok",
   }
>>> $end
=> Carbon\Carbon {#766
     +"date": "2015-08-06 00:00:00",
     +"timezone_type": 3,
     +"timezone": "Asia/Bangkok",
   }
>>> $start
=> Carbon\Carbon {#766
     +"date": "2015-08-06 00:00:00",
     +"timezone_type": 3,
     +"timezone": "Asia/Bangkok",
   }

Upvotes: 1

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