Bug #73086 [NEW]: createFromFormat method wrongly parses rfc2616 date

From: simon at programujem dot eu Operating system: Windows PHP version: 7.0.10 Package: Date/time related Bug Type: Bug Bug description:createFromFormat method wrongly parses rfc2616 date Description: ------------ The method createFromFormat of both classes \DateTime and \DateTimeImmutable incorrectly parses rfc2616 formatted date used in, but not limited to, Last-Modified and If-Modified-Since headers as defined by w3. Using the following format: 'D, d M Y H:i:s e' it does actually parse the passed rfc2616 string but the days do not match for some dates, eg. trying to parse the date 'Thu, 4 Sep 2016 07:12:28 GMT' will result in \DateTime instance or \DateTimeImmutable respectively of not the fourth September but 8th instead. The targeted PHP version is 7.0.10 running on Windows 7 x64, but the problem has been noticed in PHP 5.6.25 (running on a Linux distribution) as well. Test script: --------------- <?php $format = 'D, d M Y H:i:s e'; $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 1 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-01T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 2 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-08T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 3 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-08T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 4 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-08T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 12 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-15T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 13 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-15T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 14 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-15T07:12:28+00:00 $output = (\DateTimeImmutable::createFromFormat($format, 'Thu, 15 Sep 2016 07:12:28 GMT'))->format(\DateTime::ATOM); print_r($output.'<br>'); // 2016-09-15T07:12:28+00:00 Expected result: ---------------- 2016-09-01T07:12:28+00:00 2016-09-02T07:12:28+00:00 2016-09-03T07:12:28+00:00 2016-09-04T07:12:28+00:00 2016-09-12T07:12:28+00:00 2016-09-13T07:12:28+00:00 2016-09-14T07:12:28+00:00 2016-09-15T07:12:28+00:00 Actual result: -------------- 2016-09-01T07:12:28+00:00 2016-09-08T07:12:28+00:00 2016-09-08T07:12:28+00:00 2016-09-08T07:12:28+00:00 2016-09-15T07:12:28+00:00 2016-09-15T07:12:28+00:00 2016-09-15T07:12:28+00:00 2016-09-15T07:12:28+00:00 -- Edit bug report at https://bugs.php.net/bug.php?id=73086&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73086&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73086&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73086&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73086&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73086&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73086&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73086&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73086&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73086&r=support Expected behavior: https://bugs.php.net/fix.php?id=73086&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73086&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73086&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73086&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73086&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73086&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73086&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73086&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73086&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73086&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73086&r=mysqlcfg