Doc #77316 [NEW]: (?X) produces warning: Compilation failed: unrecognized character after (? or (

From: sp at fp dot de Operating system: PHP version: 7.3.0 Package: PCRE related Bug Type: Documentation Problem Bug description:(?X) produces warning: Compilation failed: unrecognized character after (? or ( Description: ------------ Using the PCRE_EXTRA modifier as an internal option setting inside the pattern string now produces a warning: "Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 2" I'm not really sure if this is intentional, as the RFC states: "The current patch reverts the behavior to the meaning of 'X' how it was in PCRE" https://wiki.php.net/rfc/pcre2-migration If it indeed is intentional, then at least the documentation should be updated accordingly: http://php.net/manual/en/regexp.reference.internal-options.php Test script: --------------- preg_match('/(?X)/', ''); -- Edit bug report at https://bugs.php.net/bug.php?id=77316&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77316&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77316&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77316&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77316&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77316&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77316&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77316&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77316&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77316&r=support Expected behavior: https://bugs.php.net/fix.php?id=77316&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77316&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77316&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77316&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77316&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77316&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77316&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77316&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77316&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77316&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77316&r=mysqlcfg