Bug #76526 [NEW]: Different behaviour shorthand escape codes vs unicode

From: bugs dot php dot net_nospam at adviesenzo dot nl Operating system: PHP version: 7.3.0alpha2 Package: PCRE related Bug Type: Bug Bug description:Different behaviour shorthand escape codes vs unicode Description: ------------ Not sure whether this is a bug or a feature, so reporting this for someone else to make that determination. PCRE used to find a match using the below example code on PHP < 7.3, but no longer matches on PHP 7.3. See: https://3v4l.org/lunKA Is suspect the behavioural change is related to the implementation of PCRE 2 in PHP 7.3 - https://wiki.php.net/rfc/pcre2-migration . Test script: --------------- setlocale(LC_ALL, 'C'); var_dump(preg_match('^\w+$u', 'Iñtërnâtiônàlizætiøn')); Expected result: ---------------- I'd expected the results of the regex to be the same cross-version. -- Edit bug report at https://bugs.php.net/bug.php?id=76526&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76526&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76526&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76526&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76526&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76526&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76526&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76526&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76526&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76526&r=support Expected behavior: https://bugs.php.net/fix.php?id=76526&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76526&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76526&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76526&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76526&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76526&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76526&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76526&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76526&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76526&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76526&r=mysqlcfg