DateTime ISO8601 in PHP doesnt support milliseconds

[farconada]

dates from javascript code doesnt as in:

dat = new Date();
dat.toISOString();
"2014-06-24T16:49:51.439Z"

has fractions of seconds.
PHP doesnt support fractions of seconds https://bugs.php.net/bug.php?id=51950
Drupal has a workaround https://api.drupal.org/api/drupal/core%21vendor%21zendframework%21zend-stdlib%21Zend%21Stdlib%21DateTime.php/function/DateTime%3A%3AcreateFromISO8601/8
You could workaround this in jms config with

jms_serializer:
handlers:
datetime:
default_format: "Y-m-d\TH:i:s.uO" # ISO8601
default_timezone: "UTC"

but it should be better coded in the bundle with a patch like the Drupal one

[stof]

given that the format is configurable in the handler, it cannot be implemented the Drupal way (Drupal can do it because ISO8601 is hardcoded in the code)

[pculka]

has this actually been fixed with PHP7?
https://3v4l.org/ADn0l

[goetas]

see https://bugs.php.net/bug.php?id=51950