Doc #77316 [Opn->Ver]: (?X) produces warning: Compilation failed: unrecognized character after (? or (

Edit report at https://bugs.php.net/bug.php?id=77316&edit=1 ID: 77316 Updated by: cmb@php.net Reported by: sp at fp dot de Summary: (?X) produces warning: Compilation failed: unrecognized character after (? or ( -Status: Open +Status: Verified Type: Documentation Problem Package: PCRE related PHP Version: 7.3.0 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: > "The current patch reverts the behavior to the meaning of 'X' > how it was in PCRE" This is about the X *modifier*, not about the internal option. So yes, this is a documentation issue. Previous Comments: ------------------------------------------------------------------------ [2018-12-18 18:35:07] sp at fp dot de 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 this bug report at https://bugs.php.net/bug.php?id=77316&edit=1