Doc #73551 [Csd->Ver]: DateTime with improved microsec BC change not documented in 7.1 migration guide

Edit report at https://bugs.php.net/bug.php?id=73551&edit=1 ID: 73551 Updated by: krakjoe@php.net Reported by: aa dot vasilenko at gmail dot com Summary: DateTime with improved microsec BC change not documented in 7.1 migration guide -Status: Closed +Status: Verified Type: Documentation Problem Package: Date/time related PHP Version: 7.1.0RC4 Assigned To: cmb Block user comment: N Private report: N New Comment: I believe there was a note in upgrading. This seems like a doc issue @cmb ? Previous Comments: ------------------------------------------------------------------------ [2016-11-18 11:09:53] cmb@php.net This bug has been fixed in the documentation's XML sources. Since the online and downloadable versions of the documentation need some time to get updated, we would like to ask you to be a bit patient. Thank you for the report, and for helping us make our documentation better. Fixed with <http://svn.php.net/viewvc?view=revision&revision=341067>. ------------------------------------------------------------------------ [2016-11-17 08:45:27] aa dot vasilenko at gmail dot com You're absolutely right. But still it was working 99.5% of the time :). As I said - it would be great to include it in migration guide, do not "fix" it. ------------------------------------------------------------------------ [2016-11-17 07:49:26] requinix@php.net You couldn't assume that anyways: it was unlikely, but still possible that time would change during the few microseconds between new instances, eg. 12:00:00.999999 to 12:00:01.000000. Note that the microseconds improvements happened with RC4. https://3v4l.org/E2fdA https://github.com/php/php-src/commit/55626549d81d0feadb1d160be78fcf2b898a48cc ------------------------------------------------------------------------ [2016-11-17 07:30:40] aa dot vasilenko at gmail dot com Description: ------------ Fix for #48225 in 7.10RC4 broke tests on our side. Basically now it's not possible to assume that 2 \new DateTime() are the same. Of course this is bad behavior but I'm nearly sure that a lot of business logic is using it. Would be nice to list it as a breaking change in documentation or "What's New" to prepare developers better for upcoming 7.1 release Test script: --------------- <?php $a = new DateTime(); for ($i = 0; $i < 100; $i++) { //noop, just to let some microseconds pass } $b = new DateTime(); var_dump($a == $b); Expected result: ---------------- true //<7.1RC4 Actual result: -------------- false //>=7.1RC4 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=73551&edit=1