Bug #73942 [NEW]: $date->modify('Friday this week') doesn't return a Friday if $date is a Sunday

From: blindcan at gmail dot com Operating system: Ubuntu 16.04 PHP version: 7.0.14 Package: Date/time related Bug Type: Bug Bug description:$date->modify('Friday this week') doesn't return a Friday if $date is a Sunday Description: ------------ As the summary says, $date->modify('Friday this week') doesn't return a Friday if $date is a Sunday. Running the script below on 7.0.14 and 7.0.8 yields 2017-01-02, which is a Monday. However, running the same script on 7.0.5 yields 2017-01-13, a Friday. I expected a Friday. Test script: --------------- <?php $date1 = "2017-01-08"; // this is a Sunday $date = new \DateTime($date1); $date->modify('Friday this week'); $dateFormat = $date->format('Y-m-d'); echo $dateFormat; Expected result: ---------------- Currently, it displays a Monday date on 7.0.14. Testing on 7.0.8 also yields a Monday. I expect to see a Friday date on both PHP 7.0.5, and 7.0.14. Here's another link that tests for all php versions and other base days - https://3v4l.org/ZuOhl -- Edit bug report at https://bugs.php.net/bug.php?id=73942&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73942&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73942&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73942&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73942&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73942&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73942&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73942&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73942&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73942&r=support Expected behavior: https://bugs.php.net/fix.php?id=73942&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73942&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73942&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73942&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73942&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73942&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73942&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73942&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73942&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73942&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73942&r=mysqlcfg