StackOverflow2013

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plurals

PO
primarykey
Id
8787880
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-01-09T11:43:46.650
FavoriteCount
0
LastActivityDate
2012-01-09T11:43:46.650
LastEditDate
LastEditorUserId
0
OwnerUserId
450490
ParentId
8787128
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
It appears the usage of "first" or "last" directly in the constructor of the DateTime object causes it to become immutable. This does seem like a bug. e.g. <pre class="lang-php prettyprint-override"><code>date_default_timezone_set('Europe/London'); ini_set('display_errors', 1); error_reporting(E_ALL); $interval = new DateInterval('P1D'); $date1 = new DateTime('last day of this month'); var_dump($date1); $date1->add($interval); var_dump($date1); echo "-------------------------------\n\n"; $lastDayOfMonth = date('Y-m-d H:i:s', strtotime('last day of this month')); $date2 = new DateTime($lastDayOfMonth); var_dump($date2); $date2->add($interval); var_dump($date2); echo "-------------------------------\n\n"; $date3 = new DateTime('2012-01-31 '.date('H:i:s')); var_dump($date3); $date3->add($interval); var_dump($date3); </code></pre> Results in: <pre class="lang-none prettyprint-override"><code>object(DateTime)[2] public 'date' => string '2012-01-31 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) object(DateTime)[2] public 'date' => string '2012-01-31 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) ------------------------------- object(DateTime)[3] public 'date' => string '2012-01-31 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) object(DateTime)[3] public 'date' => string '2012-02-01 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) ------------------------------- object(DateTime)[4] public 'date' => string '2012-01-31 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) object(DateTime)[4] public 'date' => string '2012-02-01 11:40:10' (length=19) public 'timezone_type' => int 3 public 'timezone' => string 'Europe/London' (length=13) </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POPHP's DateTime skipping addition
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USPhil Moorhouse
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POPHP's DateTime skipping addition
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
CommentsPostId
1. This table or related slice is empty.

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