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Bug #75745 DateTime::createFromFormat "u" specifier not interpreted correctly
Submitted: 2017-12-28 20:36 UTC Modified: 2020-04-11 15:22 UTC
From: daverandom@php.net Assigned:
Status: Closed Package: Date/time related
PHP Version: >=7.1.0 OS: Any
Private report: No CVE-ID: None
 [2017-12-28 20:36 UTC] daverandom@php.net
Description:
------------
The "u" specifier is documented as "microseconds" but is interpreted as "fraction of a second".

While this is not the correct behaviour, it is potentially a desirable behaviour, specifically one might expect to be able to interpret a date like `12:13:14.42` as having a fractional part.

I propose adding an "f" specifier (currently unused) which retains this old behaviour, and fixing "u" to work as documented.

Test script:
---------------
echo DateTime::createFromFormat('u', '42')->format('u');

Expected result:
----------------
000042

Actual result:
--------------
420000

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2017-12-28 23:02 UTC] daverandom@php.net
-PHP Version: 7.1.12 +PHP Version: >=7.1.0
 [2020-04-11 15:22 UTC] cmb@php.net
FWIW, the the v specifier (milliseconds) available as of PHP 7.3.0
behaves in the same way.
 [2022-06-08 14:59 UTC] git@php.net
Automatic comment on behalf of derickr
Revision: https://github.com/php/doc-en/commit/084a0039f62c982526dc7e4334f526b31ce2ff63
Log: Fixed bug #75745: DateTime::createFromFormat 'u' specifier not documented correctly
 [2022-06-08 14:59 UTC] git@php.net
-Status: Open +Status: Closed
 
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