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Request #71345 DateTime::__construct failed to parse fraction with more than 9 digits.
Submitted: 2016-01-12 06:22 UTC Modified: 2022-05-20 13:28 UTC
Votes:5
Avg. Score:4.4 ± 0.8
Reproduced:5 of 5 (100.0%)
Same Version:2 (40.0%)
Same OS:2 (40.0%)
From: iceberg_young at 126 dot com Assigned: derick (profile)
Status: Closed Package: Date/time related
PHP Version: 7.0.2 OS: Any
Private report: No CVE-ID: None
View Developer Edit
 [2016-01-12 06:22 UTC] iceberg_young at 126 dot com 
Description:
------------
DateTime::__construct cannot parse [W3] datetime format with fraction of second has more than **9** digits.
E.g.
	new \DateTime("2016-01-01T01:02:03.123456789-01:02");
will fail, while
	new \DateTime("2016-01-01T01:02:03.12345678-01:02");
is ok.

Tried PHP version: 5.5.26 and 7.0.2
Tried OS: CentOS 6.7, openSUSE Tumbleweed, Windows 7

---

[W3]: http://www.w3.org/TR/NOTE-datetime-970915

Test script:
---------------
<?php
$w3 = new \DateTime("2016-01-01T01:02:03.123456789-01:02");
echo $w3->format("Y-m-d\TH:i:s.uP");

Expected result:
----------------
(No exception throw!)
2016-01-01T01:02:03.123457-01:02

Actual result:
--------------
PHP Warning:  Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (2016-01-01T01:02:03.123456789-01:02) at position 0 (2): The timezone could not be found in the database' in php shell code:1

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2016-01-12 06:38 UTC] requinix@php.net
-Type: Bug +Type: Feature/Change Request
 [2016-01-12 08:43 UTC] salsi at icosaedro dot it 
Might be related to bug #69122 "strtotime and DateTime fail to parse certain strings with fractional seconds".
 [2016-06-14 11:18 UTC] mkroese at eljakim dot nl 
Encountered this one today too, while parsing actual timestamps received from another party.

Following paste shows it still works up to 8 digits, and fails at 9 (without a timezone suffix, which makes the error message even more cryptic):
https://3v4l.org/pMvig

It also shows that the fraction isn't handled correctly with 8 digits (23:59:59.1000000)
 [2020-11-09 11:24 UTC] jan dot espen dot oversand at cerpus dot com 
Unfortunately I don't have the resources available to verify with a build of php-src right now.

But, I think, maybe this is related to the max length of 8 at line 1245 of https://github.com/php/php-src/blob/master/ext/date/lib/parse_date.re

time->us = timelib_get_frac_nr(&ptr, 8);

Maybe if that was increased to at least 9 (nanosecond) precision. Other systems are doing nanosecond precision and interoperability problems will occur with this limitation.
 [2022-05-20 13:28 UTC] derick@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: derick
 [2022-05-20 13:28 UTC] derick@php.net 
Thank you for your bug report. This issue has already been fixed
in the latest released version of PHP, which you can download at
http://www.php.net/downloads.php

Both variants of the original comment parse in PHP 8.1, although PHP does not have a high resolution than microseconds:

<?php
var_dump(new \DateTime("2016-01-01T01:02:03.123456789-01:02"));
var_dump(new \DateTime("2016-01-01T01:02:03.12345678-01:02"));
?>

Standard input code:2:
class DateTime#1 (3) {
  public $date =>
  string(26) "2016-01-01 01:02:03.123456"
  public $timezone_type =>
  int(1)
  public $timezone =>
  string(6) "-01:02"
}
Standard input code:3:
class DateTime#1 (3) {
  public $date =>
  string(26) "2016-01-01 01:02:03.123456"
  public $timezone_type =>
  int(1)
  public $timezone =>
  string(6) "-01:02"
}
 
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