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Request #64814 Nano precision is not supported while decoding RFC 3339 formatted date/times.
Submitted: 2013-05-10 17:29 UTC Modified: 2022-05-13 13:54 UTC
Votes:9
Avg. Score:4.2 ± 0.8
Reproduced:9 of 9 (100.0%)
Same Version:1 (11.1%)
Same OS:2 (22.2%)
From: marc at weistroff dot net Assigned: derick (profile)
Status: Closed Package: Date/time related
PHP Version: 5.5.0RC1 OS:
Private report: No CVE-ID: None
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From: marc at weistroff dot net
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 [2013-05-10 17:29 UTC] marc at weistroff dot net 
Description:
------------
While trying to parse a RFC3339 datetime, PHP will generate the error "The 
timezone could not be found in the database".

It can cause problems with other systems that produce such date/time strings.

As you can see on http://3v4l.org/Bl1Kv, it affects php from version 5.2.0 to 
5.5.0.

Test script:
---------------
<?php
date_default_timezone_set('UTC');
var_dump(date_parse("2006-12-12T10:00:00.999999999-04:00"));
?>

Expected result:
----------------
array(15) {
  ["year"]=>
  int(2006)
  ["month"]=>
  int(12)
  ["day"]=>
  int(12)
  ["hour"]=>
  int(10)
  ["minute"]=>
  int(0)
  ["second"]=>
  int(0)
  ["fraction"]=>
  float(0.999999999)
  ["warning_count"]=>
  int(0)
  ["warnings"]=>
  array(0) {
  }
  ["error_count"]=>
  int(0)
  ["errors"]=>
  array(0) {
  }
  ["is_localtime"]=>
  bool(true)
  ["zone_type"]=>
  int(1)
  ["zone"]=>
  int(240)
  ["is_dst"]=>
  bool(false)
}

Actual result:
--------------
array(13) {
  ["year"]=>
  int(2006)
  ["month"]=>
  int(12)
  ["day"]=>
  int(12)
  ["hour"]=>
  int(10)
  ["minute"]=>
  int(0)
  ["second"]=>
  int(0)
  ["fraction"]=>
  float(0.99999999)
  ["warning_count"]=>
  int(0)
  ["warnings"]=>
  array(0) {
  }
  ["error_count"]=>
  int(1)
  ["errors"]=>
  array(1) {
    [0]=>
    string(47) "The timezone could not be found in the database"
  }
  ["is_localtime"]=>
  bool(true)
  ["zone_type"]=>
  int(0)
}

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 [2013-05-10 17:33 UTC] marc at weistroff dot net 
I should have precise in the description of the bug that PHP returns an error when  
the number of digits in the "time-secfrac" part is > 8.
 [2015-02-11 07:43 UTC] friedrich dot grosse at gmail dot com 
This is a problem for me when consuming JSON that has been generated by a service written in go. There the default format for time objects is RFC3339Nano
 [2017-04-21 15:52 UTC] antoine dot hedgecock at gmail dot com 
I'm experience the same issue as the person above, go generate a timestamp with rfc3339 with a lot of precision. Php should just truncate the excess digits instead of failing with a very weird error.
 [2017-10-24 06:16 UTC] stas@php.net
-Type: Bug +Type: Feature/Change Request
 [2022-03-04 14:17 UTC] kaare at slettnes dot org 
This bit me while fetching payment transaction data from a third party service. I'm guessing they use the iso 8609 timestamp as primary key for records as each transaction has a timestamp with nano seconds.

These dates fails:
- 2022-02-05T23:59:58.600200034+01:00
- 2022-02-05T23:59:58.600200000
- 2022-02-05T23:59,00000+0100
- 2022-02-05T23:59,00000

These are ok:
- 2022-02-05T23:59:58.60020003+01:00
- 2022-02-05T23:59:58.60020003
- 2022-02-05T23:59,6002+01:00 (*)
- 2022-02-05T23:59,6002 (*)

(*) According to the iso 8609 standard, fractions are allowed in minutes as well, but are not treated correctly in php.

Also, from the wikipedia article on 8601: "There is no limit on the number of decimal places for the decimal fraction. However, the number of decimal places needs to be agreed to by the communicating parties."
 [2022-05-13 13:54 UTC] derick@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: derick
 [2022-05-13 13:54 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

PHP 8.1 already trims the extra digits without throwing a warning:

$ php -r 'print_r(date_parse("2006-12-12T10:00:00.999999999-04:00"));';
Array
(
    [year] => 2006
    [month] => 12
    [day] => 12
    [hour] => 10
    [minute] => 0
    [second] => 0
    [fraction] => 0.999999
    [warning_count] => 0
    [warnings] => Array
        (
        )

    [error_count] => 0
    [errors] => Array
        (
        )

    [is_localtime] => 1
    [zone_type] => 1
    [zone] => -14400
    [is_dst] => 
)
 
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