Bug #76221 [NEW]: last optional capturing group is not included when using PREG_UNMATCHED_AS_NULL

From: wes dot nospam at nospam dot example dot org Operating system: PHP version: 7.2.4 Package: PCRE related Bug Type: Bug Bug description:last optional capturing group is not included when using PREG_UNMATCHED_AS_NULL Description: ------------ Not sure this is a bug, adding in case it is. There are two capturing groups in the regexp, so I expect $matches to be of length 3. https://3v4l.org/1ulVZ hope this helps... Test script: --------------- preg_match("/^(aaa)(?:(x)?)/", "aaay", $matches, PREG_UNMATCHED_AS_NULL); var_dump($matches); Expected result: ---------------- array(2) { [0]=> string(3) "aaa" [1]=> string(3) "aaa" [2]=> NULL } Actual result: -------------- array(2) { [0]=> string(3) "aaa" [1]=> string(3) "aaa" } -- Edit bug report at https://bugs.php.net/bug.php?id=76221&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76221&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76221&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76221&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76221&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76221&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76221&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76221&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76221&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76221&r=support Expected behavior: https://bugs.php.net/fix.php?id=76221&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76221&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76221&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76221&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76221&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76221&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76221&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76221&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76221&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76221&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76221&r=mysqlcfg